Search - TDS

Try Pack - Outdoor Pack

If the climate in your region allows it and outdoor cultivation is your choice but you don´t know how to start, let Biobizz® make it easy for you. Try our Outdoor·Pack, one of the four members of the recently launched family of Biobizz® Try·packs. Get to grow like a pro with a high quality complete pack that has been designed to be easy to handle, easy to use, easy to combine* and easy to pay. The Outdoor-pack contains Bio·Bloom™, Fish·Mix™ and Top·Max™...

£15.95

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HI-981404N Waterproof pH/TDS Meter with Smart Electrode

The HI-981404N is ideal for agricultural, horticultural and hydroponics applications where pH and TDS levels need to be continuously monitored for optimal plant growth. This instrument continuously monitors and displays the values of a solution on an easy to read set of LCD's. This meter is supplied with the HI 1286 replaceable gel filled pH electrode with BNC connector, protected behind a water resistant sleeve. The unique design of the electrode guarant..

£360.95

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HI-981504/5 pH/TDS/Temperature Monitor

The HI-981504/5-02 offers continuous measurement of pH, TDS and temperature, simultaneously displayed on one display. The HI-1286 gel-filled pH electrode is provided with a water resistant sleeve to protect the BNC connector. The unique design of the electrode provides longer life in aggressive solutions. The HI-7634 TDS probe is easy to clean and requires little maintenance. Measurements are accurate and the meter can be calibrated at one or two points f..

£482.95

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HI-983308 TDS Meter, 9.99 ppt (g/L)

The HI-983308-02 water resistant TDS meter is Hanna's reply to requests for accurate, affordable process monitoring with low maintenance. This meter is supplied with a direct 2-pin probe and 2m cable with ½" thread for flow-thru mounting. The probe has a temperature sensor to automatically compensate against temperature changes from 5 to 50°C. In the measurement mode, a red LED will warn the user in the event the reading is outside of the alarm interval...

£165.95

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HI-991404 pH/EC/TDS/Temperature Monitor

The HI-991404 combo meter is designed for continuous, high accuracy pH, EC/TDS and temperature measurements. This microprocessor indicator continuously monitors the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument. Featuring a large, dual-level, backlit LCD the HI-991404-02 gives you instantaneous reading of pH, EC or TDS and temperature, even from a distance. &nb..

£416.95

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HI-991405 pH/EC/TDS/Temperature Monitor

The HI-991405 combo meter is designed for continuous, high accuracy pH, EC/TDS and temperature measurements. This microprocessor indicator continuously monitors the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument. Featuring a large, dual-level, backlit LCD the HI-991405-02 gives you instantaneous reading of pH, EC or TDS and temperature, even from a distance. &nb..

£415.95

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HI-993301 EC/TDS Temperature Grocheck Monitor

Water resistant and chemically resistant, the HI-993301 has been designed to meet the grower's need for equipment suited to the aggressive environments found in agricultural and hydroponics applications. This monitor has a backlit LCD and displays instantaneous readings of both EC or TDS and temperature-even from a distance. This instrument features a stability indicator that prompts the user when to take the reading. For manual recording purposes, readi..

£213.95

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HI-993302 EC/TDS/Temperature Grocheck Monitor

Water resistant and chemically resistant, the HI-993302 has been designed to meet the grower's need for equipment suited to the aggressive environments found in agricultural and hydroponics applications. This monitor from has a backlit LCD and displays instantaneous readings of both EC or TDS and temperature-even from a distance. The HI-993302-02 features a stability indicator that prompts the user when to take the reading. For manual recording purposes,..

£213.95

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HI-98129 Pocket EC/TDS and pH Tester, Low Range

The HI-98129 is a waterproof tester that offers high accuracy pH, conductivity, total dissolved solids and temperature measurements in a single meter. Main benefits Easy to read display and automatic shut-off pH and EC/TDS readings are automatically temperature compensated EC/TDS conversion factor is user selectable as well as the temperature compensation coefficient Features replaceable pH electrode together with an EC/TDS graphite electrode Calib..

£293.95

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HI-98130 Pocket EC/TDS and pH Tester, High Range

The HI-98130 is a water resistant tester that offers high accuracy pH, conductivity, total dissolved solids and temperature measurements in a single meter. Key features Automatic 1 or 2 point pH calibration Rubberised keyboard Quick and easy to operate Easy switch between Celsius & Fahrenheit readouts HOLD function Easy to replace pH electrode cartridge with sturdy snap-in connector means there are no pins to bend or break Large LCD display ..

£293.95

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HI-991300N pH/EC/TDS/C Handheld Meter

Measuring pH, conductivity, total dissolved solids and temperature in one slim lightweight casing and with one single probe - the HI-991300N is an ideal portable pH tester. There are only 2 buttons, yet you can select from a range of calibration buffers and even the temperature scale most familiar to you. The housing is waterproof and rated for IP 67 conditions. The HI-1288 pre-amplified multiparameter probe features an easy to clean sensor and a cloth j..

£1,098.95

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HI-991301N High Range EC, TDS, pH and °C Meter

The HI-991301 high range meter offers great precision at high range to meet exacting requirements for testing pH, electro-conductivity, total dissolved solids and temperature. Designed for optimum consistency and reproducibility the HI 991301 portable high range conductivity meter offers a great range of user selectable features to deliver greater consistency and reproducibility Different TDS factors ranging from 0.45 to 1.00 Temperature coefficients (ß)..

£1,059.95

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HI-9811-5N pH/EC/TDS/°C Portable Meter

HI 9811-5 is a pH/EC/TDS waterproof meter designed for simplicity in taking pH, µS/cm, ppm (mg/L) and temperature measurements. Both the HI 9811-5 and HI 9812-5 are ideal for hydroponics, greenhouses, farming and ground water applications.. Due to the built-in temperature sensor, conductivity readings are automatically compensated for temperature changes. No probe changes are required when switching your measured parameter between pH, conductivity and TDS..

£468.95

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HI-9813-5N pH/EC/TDS/°C Portable Meter

The HI 9813-5 is a versatile, water resistant, multiparameter portable instrument specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. This meter features a large LCD that clearly displays the parameter being measured as well as calibration instructions. Calibration is fast and easy with knobs located on the front panel of the instrument. The HI 9813-5 is a pH/EC/TDS meter designed for simplicity of ..

£401.95

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HI-9812-5N pH/EC/TDS/°C Portable Meter

The HI 9812-5 is a pH/EC/TDS water resistant meter designed for simplicity in taking pH, µS/cm, ppm (mg/L) and temperature measurements. The HI 9812-5 is ideal for hydroponics, greenhouses, farming and ground water applications. Due to the built-in temperature sensor, conductivity readings are automatically compensated for temperature changes. No probe changes are required when switching your measured parameter between pH, conductivity and TDS. These mult..

£401.95

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HI-9813-6N pH/EC/TDS/°C Portable Meter

The HI 9813-6 is a versatile, water resistant, multiparameter portable instrument specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. This meter features a large LCD that clearly displays the parameter being measured as well as calibration instructions. Calibration is fast and easy with knobs located on the front panel of the instrument. The HI 9813-6 includes all the features of the HI 9813-5 while..

£401.95

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Mi306 Conductivity / TDS / NaCl / Temperature Professional Portable Meter

Mi306 is a waterproof portable logging microprocessorbased Conductivity / TDS / NaCl / Temperature meter. The autoranging feature of the EC and TDS ranges automatically sets the meter to the scale with the highest possible resolution. The Auto Endpoint (HOLD) feature automatically freezes the display when a stable reading is reached. The measurements are automatically (ATC) or manually (MTC) compensated for temperature. The temperature coefficient value i..

£712.95

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Mi805 pH / Conductivity / TDS / Temperature Professional Portable Meter

Measures 4 parameters with 1 single probe. Mi805 offers you a combination of pH, Conductivity, total dissolved solids and temperature measurements. You can select from a range of calibration buffers and also the temperature scale (°C or °F) can be selected. The multi-parameter probe MA851D/1, includes pH/EC/TDS and temperature, all in one rugged handle. Other features include different TDS factors from 0.45 to 1.00, and a range of temperature coefficients..

£647.95

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MW801 Standard Portable pH / Conductivity / TDS Combination Meter

3 meters in 1! This meter allows you to measure pH, EC (conductivity) and TDS with just one instrument and one single probe! The MW801 with a Conductivity range that goes up to 1990 µS/cm and TDS range that goes up to 1990 ppm is an ideal tool for drinking water measurements. Supplied with the SE600 interchangeable probe to measure pH, Conductivity and TDS. The pH electrode utilizes a fiber junction to reduce contamination when measuring fertilizer solut..

£364.95

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Hydromaster HM-500 Continuous pH/EC/TDS/Temp Monitor

HM-500: Continuous pH/EC/TDS/Temp Monitor hydromasterThe HM Digital HydroMaster (HM-500) monitors pH, Temp˚C/˚F, EC & TDS providing accurate, stable readings the user can rely on. The unit can be wall mounted, is portable thanks to its rechargeable battery, and can be used as a benchtop monitor with its stand. Continuous pH/EC/TDS/Temp Monitor Rechargeable battery RF Resistant Portable/Wall Mount/Benchtop Data Storage: Up to 20 measurement read..

£324.95

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Hanna Groline pH/EC/TDS/Temperature Meter HI-9814

The HI-9814 is a lightweight, waterproof portable pH, conductivity, TDS and temperature meter supplied with a specialist multiparameter probe designed for hydroponics, greenhouse and agricultural applications. Key features Compact, robust casing Simultaneous readout of pH, EC or TDS and °C Simple two button keyboard Waterproof design to withstand the humidity of a growing environment Specialist multi-parameter electrode Optional green protective r..

£321.95

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Hanna Groline Waterproof pH/EC/TDS/Temperature Tester HI-98131

The HI-98131 is a slim, lightweight, and waterproof pocket tester that measures pH, conductivity, TDS and temperature. This versatile pocket meter is designed for hydroponics, greenhouse and agriculture applications. The meter operation is simplified with two buttons. One is used for on/off and for calibration while the other is used to switch between the measurement modes. The HI-98131 has advanced features including a selectable EC to TDS conversion fac..

£236.95

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Hanna Groline Waterproof EC/TDS/Temperature Tester HI-98318

The HI-98318 is our latest pocket meter for measuring the EC/TDS of a hydroponic nutrient solution. The ergonomic design allows this tester to fit comfortably in your hand. The large easy to read LCD display shows both EC or TDS and temperature along with calibration, stability and low battery indicators. All operations are simplified to two buttons. One is for turning the meter on/off and the other for automatic one point calibration. The GroLine Waterpr..

£93.95

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Enviro ETD-150 Air Pump - Air Blower

The Enviro ETD150 air pump ensures that there is plenty of water movement in pons and wastewater applications; this boosts oxygen levels in the water, allowing aerobic bacteria to decompose. The ETD series offer high flow from a small footprint, and offer a useful alternative to expensive and ineffective rotary vane and side-channel blowers. Designed for use in sewage aeration applications the Charles Austen ETA Enviro air pump range is situated out..

£286.95

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Enviro ETD-200 Air Pump - Air Blower

The Enviro ETD200 air pump ensures that there is plenty of water movement in pons and wastewater applications; this boosts oxygen levels in the water, allowing aerobic bacteria to decompose. The ETD series offer high flow from a small footprint, and offer a useful alternative to expensive and ineffective rotary vane and side-channel blowers. Designed for use in sewage aeration applications the Charles Austen ETA Enviro air pump range is situated out..

£319.95

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HydroLogic Stealth - RO TDS Monitor

Measures unpurified water PPM going into reverse osmosis (RO) system and purified water PPM coming out. Monitors the performance of your RO system. Instantly displays values and allows you to switch back and forth between dirty and clean water TDS. Indicates when it’s time to change the RO membranes. Designed with ⅜" inlet fitting and ¼" outlet fitting, to be used with the Stealth-RO™. Can also be used with other systems that have ⅜" and ¼" tubing. Part..

£65.95

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Aptus Outdoor Set

A set with all you need for outdoor growing. Contains: 5 x 100ml All-in-One Pellet Mycorrhizae 5g NutriSpray 20ml Super-PK 150ml Startbooster 50ml..

£50.95

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Milwaukee MW804 MAX Waterproof 4-in-1 pH / EC / TDS / Temp

The Milwaukee MW804 MAX Waterproof 4-in-1 pH/EC/TDS/Temp Tester is designed as an all-in-one solution for growers. Accuracy The MW804 MAX 4-in-1 tester is accurate to ±0.05 pH, EC/TDS to 2% Full Scale and ±0.5°C / ±1°F for temperature. With automatic calibration and 5 memorized calibration points, the tester can be quickly and easily be calibrated to a higher accuracy compared with manual calibration. Long life The tester comes with a replaceable pH p..

£182.95

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Combo Pen P160 Pro pH, EC, TDS, PPM, Temp Meter

The updated Combo Pen P160 Pro features a modern and robust housing. The major advantage of this model is its analogue EC calibration. This means that the calibration solution does not need to have a temperature of exactly 25ºC. Calibration takes place without any deviations. EC calibration solutions are extremely sensitive to temperature. However, this does not apply to pH. You can easily replace the electrode should it be worn or dam..

£181.95

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Hanna Groline PH/EC/TDS/Temp Monitor

Quick to setup and simple to use, this monitor was designed with hydroponics, aquaponics, and greenhouses in mind. Make your nutrient solution easy to manage with the Groline monitor and combined pH/EC/temperature probe. Instantly view all measurements The versatile display of the Groline monitor allows for three screen modes. The LCD can display all three essential hydroponic nutrients measurements at one time, a 3-second cycle of single measurements, ..

£599.95

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Hanna Pocket TDS Tester (0.00 to 10.00ppt) HI-98302

The HI-98302 is a rugged and reliable pocket-sized tester that offers quick and accurate readings of TDS and ideal for testing in the field and the laboratory. Waterproof Automatic temperature Compensation (ATC) Measurement stability indicator Temperature measurement This tester features an amperometric graphite electrode that provides better repeatability in measurements since it does not oxidise. The HI-98302's non-oxidising graphite pins..

£97.95

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Hanna Pocket TDS Tester (0 To 2000MG/L) HI-98301

This pocket sized total dissolved solids (TDS) tester has a range of 0 to 1999ppm (mg/L) and a resolution of 1ppm (1 mg/L). The HI-98301 is a rugged and reliable pocket-sized tester that offers quick and accurate readings of TDS and is ideal for testing in the field and the laboratory. Waterproof Automatic temperature Compensation (ATC) Measurement stability indicator Temperature measurement This tester features an amperometric graphite electrode ..

£97.95

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Research Grade EC/TDS Meter with USP HI-5321

HI-5321 can be used to perform all 3 stages of USP method required for conductivity measurement of pure and ultra-pure water. HI-5321 can be used to perform all 3 stages of USP <645> method required for conductivity measurement of pure and ultra-pure water. The instrument provides clear directions on how to perform each testing stage and automatically monitors the temperature, conductivity and stability during testing and determines whether a sample..

£1,338.95

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Hanna PRIMO3 Pocket TDS/Temperature Tester (0 to 1999ppm)

The pocket sized PRIMO3 tester provides a fast and dependable way to measure the total dissolved solids in water samples. The PRIMO3 is ideally suited to the rigorous demands of water quality professionals who will appreciate the practicality of the clear, easy to read LCD for demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure the readings are consistent to the standard or..

£128.95

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Hanna Research Grade pH, ORP, ISE, EC, TDS, Resistivity, Salinity Bench Meter HI-5522

Up to four conductivity calibration points can be used to increase measurement accuracy: One fixed-point salinity calibration on the percent scale Three methods for calculating seawater Practical scale Natural seawater scale Percent scale HI-5522 is an ideal research-grade instrument with large easy read graphic display and soft touch keypad. Customise to your application The display is customisable and can display two channels simultaneously. M..

£1,558.95

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Hanna Professional Waterproof EC/TDS/Resistivity/Salinity Meter HI-98192

The HI-98192 is a waterproof, portable conductivity meter that has an expanded conductivity range from 0.000µS/cm to 400 mS/cm, as well as TDS, resistivity and three salinity scales. This meter automatically recognises the probe type (two or four ring) and allows the user to adjust the nominal cell constant. HI-98192 is also ready to perform all three stages USP <645> method required for EC measurement of ultrapure water. Choose from seven memorised..

£1,192.95

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Hanna EC, TDS and Temperature Tester, Low Range HI-98311

The DiST's ease of use, in combination with its affordability, makes it the must-have equipment for EC and TDS measurement. PPM. With an impressive range of features, the HI-98311 pocket tester is unmatched in the marketplace for EC/TDS and temperature measurement. Designed for ease of use with a floating, waterproof case and offer the following features: Measurement of conductivity (EC) and total dissolved solids (TDS) Automatic calibration and tempera..

£203.95

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Hanna EC/TDS/Temperature Meter - High Range HI-99301

The new and improved HI-99301. With it's larger user friendly LCD, tutorial messages for calibration and setup, missing probe indicator, newer rugged ergonomic casing, faster and easier battery replacement and probe situated on the bottom of the instrument for ease ot use, the updated model is much more effiecent. The HI-99301 is a portable, EC/TDS/temperature meter that measures high range conductivity in mS/cm and TDS in ppt. Both instruments are housed..

£367.95

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Hanna Multi-range TDS Meter HI-8734

This portable total dissolved solids (TDS) meter offers 3 measurement ranges to suit a wide range of applications and is supplied complete with a robust probe on a 1m long cable. The effects of temperature can be manually compensated for via a rotary knob on the front of the meter. The HI-8734 has not only been specifically designed for the water condition industry, but particularly in the softening, demineralisation, reverse osmosis and drinking water ap..

£770.95

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Hanna Waterproof pH, EC, TDS and Temperature Meter with Advanced Features HI-991300

The HI-991300 is a light weight, portable pH, conductivity and temperature meter for portable applications requiring both a pH and conductivity measurement. Applications include measurements for greenhouses irrigation, hydroponics and groundwater monitoring from agriculture nutrient pollution. The HI-991300 meter features two operation button and is simple to use. All operations and settings, including calibration buffers and temperature scale selections,..

£1,006.95

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Hanna High Range EC, TDS, pH and °C Meter HI-991301

The HI-991301 high range meter offers great precision at high range to meet exacting requirements for testing pH, electro-conductivity, total dissolved solids and temperature. Designed for optimum consistency and reproducibility the HI-991301 portable high range conductivity meter offers a great range of user selectable features to deliver greater consistency and reproducibility Different TDS factors ranging from 0.45 to 1.00 Temperature coefficients (ß)..

£965.95

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Hanna Multiparameter EC/TDS/°C/NaCl HI-9835

The HI-9835 combines the four important parameters needed to measure conductivity in one high precision multiparameter instrument. Designed to allow simultaneous sampling of electro conductivity (EC), total dissolved solids (TDS) sodium chloride (NaCl) and temperature, this is a great portable meter for measuring conductivity in testing or pressured environments. Key features Choose between automatic and manual temperature compensations to matc..

£1,368.95

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pH/EC/TDS and temperature Portable Meter HI-9813-51

This meter features a large LCD which displays either pH, EC, TDS or temperature readings along with tutorial instructions. The pH readings are displayed with a 0.1 resolution and an accuracy of ±0.1 pH while the EC and TDS readings are displayed with a 0.01 mS/cm and 1ppm (mg/L) resolution and 2% full scale accuracy. The EC range of both meters is from 0.00 to 4.00 mS/cm and TDS is from 0 to 1999ppm. The temperature correction coefficient (β) is fixed a..

£367.95

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pH EC TDS Temperature Portable Meter HI-9812-51

These meters feature a large LCD which displays either pH, EC, TDS or temperature readings along with tutorial instructions. The pH readings are displayed with a 0.1 resolution and an accuracy of ±0.1 pH while the EC and TDS readings are displayed with a 10 m/s/cm and 10 ppm (mg/L) resolution and 2% full scale accuracy. Please select the meter with the range you require for your testing. The temperature correction coefficient (β) is fixed at 2%/°C and all..

£367.95

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Hanna HI-9811-51 pH/EC/TDS Meter with HI-1285-51

These meters feature a large LCD which displays either pH, EC, TDS or temperature readings along with tutorial instructions. The pH readings are displayed with a 0.1 resolution and an accuracy of ±0.1 pH while the EC and TDS readings are displayed with a 10 m/s/cm and 10 ppm (mg/L) resolution and 2% full scale accuracy. Please select the meter with the range you require for your testing. The temperature correction coefficient (β) is fixed at 2%/°C and all..

£380.95

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Hanna pH/EC/TDS and Temperature Portable Meter with CAL Check HI-9813-61

This meter features a large LCD which displays either pH, EC, TDS or temperature readings along with tutorial instructions. The pH readings are displayed with a 0.1 resolution and an accuracy of ±0.1 pH while the EC and TDS readings are displayed with a 0.01 mS/cm and 1ppm (mg/L) resolution and 2% full scale accuracy. The EC range of both meters is from 0.00 to 4.00 mS/cm and TDS is from 0 to 1999ppm. The temperature correction coefficient (β) is fixed at ..

£324.95

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Growlink TDR310W Acclima Substrate Sensor

A fully integrated digital TDR soil moisture sensor from the Soil Smart series. Works well in various soil types and soilless media. Sized with 10 cm waveguide rods to fit well with rockwool cubes. Features SDI-12 Interface 3-element 10 cm stainless steel waveguide 5 m 3-conductor waterproof cable (standard) Waterproof Epoxy-filled Housing 20% to 80% Incident Wave Rise Time: 300 ps Waveform Digitizing Resolution: 5 ps Incident Wave Amplitude:&nbs..

£537.95

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Trotec TDS19E 2.8Kw Fan Heater

Fan heater from Trotec TDS19E, 2.8Kw, thermostatic controls, 2 heat settings...

£147.95

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Oneness

Through extensive research and development, the Humboldt Nutrients teams of agronomists and chemists have created this premium One-part formula. Oneness contains a unique proprietary combination of macro and micro nutrients which cannot be found in competing One-part formulas. Oneness protects your garden from nutrient lock-out and salt build-up. Oneness is used as a food source by both plants and microorganisms. Oneness can help assure that your fruits, ..

£10.95

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Oneness Kit

This basic starter kit contains the primary Oneness nutrient solution as well as three primary additives a gardener will need to build a good foundation for growth. Contains: Humboldt Oneness 946ml Humboldt Ginormous 946ml Humboldt Sea Cal 473ml Humboldt White Widow 28.5g Humboldt Honey 473ml..

£110.95

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Master A+B

Humboldt Nutrients Master A is the highly concentrated Nitrogen, Potassium/Calcium and micro nutrients containing formula for use primarily in the growing phase when used in conjunction with Master B. For use in any growing medium. Humboldt Nutrients Master B is the highly concentrated Phosphorus, Potassium and Magnesium containing formula for use primarily in the flowering phase when used in conjunction with Master A. For use in any growing medium. Humb..

£27.95

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Master A+B Kit

A premium two-part basic starter kit that provides the core nutrients in Humboldt's Master A and B schedule, with the addition of two key products for successful gardening. Contains: Humboldt Master A 946ml Humboldt Master B 946ml Humboldt Sea Cal 473ml Humboldt Ginormous 946ml Humboldt White Widow 28.5g..

£110.95

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Grow Natural

Humboldt Nutrients Grow Natural is an ultra-concentrated organic, natural grow formula designed to give your Soil grown plants the nutrient-rich foundations needed during the vegetation and flowering period. Used in conjunction with Bloom Natural and DeuceDeuce, Grow Natural can help your plants to reach their full potential. Grow Natural is made using fresh ingredients; none of our products are imported from overseas making our prices affordable to the c..

£12.95

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Bloom Natural

Humboldt Nutrients Bloom Natural is an ultra-concentrated organic, natural bloom formula designed to give your Soil grown plants the large phosphorus and calcium boost needed during the flowering period. Using Bloom Natural in conjunction with Grow Natural and DeuceDeuce can allow your plants to reach their full potential. Bloom Natural induces a superb flowering response in all plants, encouraging multiple flowering sites. This can produce a massive crop..

£12.95

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Mayan MicroZyme

Mayan MicroZyme is a bacterial-enzymatic concentrate full of microorganisms that can increase fertility while providing vital nutrients to all types of plants and crops. The micro-organisms present in Mayan MicroZyme (MMZ) mineralize nutrients, produce and regulate nitrogen, build organic matter in your soil, and can improve fertility and fruit yields by increasing nutrient uptake and availability. The micro-organisms in Mayan MicroZyme are dormant with a..

£16.95

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ProZyme

ProZyme is an enzymatic treatment for growing mediums. Enzymes are biological catalysts, derived from living organisms, and catalysts increase the speed of naturally occurring chemical reactions. ProZyme is a concentrate, made up of over 80 different beneficial enzymes. Humboldt Nutrients employs the foremost experts in horticultural enzymes to formulate ProZyme into a highly diverse blend of enzymatic compounds. The result is a rich, dark biological whic..

£18.95

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Roots

Humboldt Roots is a highly concentrated organic root stimulant that expands the root zone during the critical growth stage. The soul of every plant resides in the roots. Many gardeners neglect this fact and concentrate on the visual aspects of their plants. A large yield is directly related to a plant’s metabolism rates, and plant metabolism rates are directly related to their root zones’ uptake of nutrients and fertilizers. Humboldt Roots was specificall..

£18.95

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White Widow

Mycorrhizal inoculants are crucial to sustaining a healthy, expansive root zone. Humboldt Nutrients is proud to launch our newest and most powerful soluble mycorrhizal, White Widow. White Widow is a mycorrhizal powder containing mycological spores. White Widow is a diverse, pure endomycorrhizal. The effectiveness of a soluble mycorrhizal inoculant relies heavily on two variables: the amount of spores in the product itself and the ability of that product t..

£14.95

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Hydro Deuce

Similar to DeuceDeuce but not as thick, making it available for use with run-to-waste and recirculating hydroponic systems. Used in the late flowering stages...

£10.95

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Sea Cal

Humboldt Nutrients Sea Cal was designed in Humboldt County to be a powerful additive for hydroponics and all growing mediums. Sea Cal may be utilized for any type of vegetable, flower or herb. Sea Cal is a concentrated growth enhancer and calcium supplement that offers vital nitrogen and calcium in the ratios which are beneficial during early plant development. Calcium is very important during a plant’s vegetative and flowering cycle, controlling aspects o..

£15.95

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Sea Mag

Humboldt Nutrients Sea Mag was designed in Humboldt County to be a powerful additive for hydroponics and all growing mediums. Sea Mag may be utilized for any type of vegetable, flower or herb. Sea Mag is loaded with vital elements which help control cell division, cell growth, cell differentiation and various internal processes. Sea Mag can be used to supplement magnesium and to increase plant growth. Sea Mag supplies crucial elements that plants require..

£13.95

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Equilibrium

If you want to reap a large bountiful harvest your plants must receive the correct ratio of Calcium to Magnesium throughout their life cycle; but for that harvest to be flavorful, sweet and aromatic, one must ensure that the Ca and Mg you are feeding your garden is derived from high quality source materials. With Equilibrium Natural, Humboldt Nutrients offers the ease of a one part Ca-Mg additive with the quality that has come to be associated with our pr..

£12.95

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Structural Integrity

Silicate is one important element most soils lack. Using Potassium Silicate for your garden protects plants from high salinity, pests, molds, and transpiration in higher temperatures. SI enhances the plant immunity mechanism by entering the plant cell walls. SI is essential to the leaf and stem strength and allowing the plant to hold up heavier fruits. High silicate content in plant tissue enables the leaves to be held erect which allows more light t..

£13.95

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Hum-Bolt

HUM-BOLT is a 8% humic acid derived from premium Leonardite, extracted from a mine known to produce the highest quality shale. Humic acid promotes high ion exchange capabilities, stimulates plant enzymes, increases beneficial organisms and acts as an organic catalyst. For years humic acid has been largely absent from our soil, due to erosion and over-farming. Thankfully, recent research has proven long-stated claims about humic acid’s benefits, which garde..

£9.95

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Flavorful

FlavorFul is a strong solution of 8% refined Humic acid concentrate, a little known and highly useful additive. The majority of refined Humic acid formulas on the market are .01% concentration. The clear appearance of these watered down derivatives is an indication of the low concentration. FlavorFul is 8% refined Humic acid with a dark rich color, indicating the high concentration. FlavorFul is comprised of long chains of organic carboxyl and polyhydroxid..

£9.95

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Big Up Powder

A local legend in Humboldt County: Big Up Powder is a premium bloom booster. Humboldt Nutrients agronomists and chemists have developed Big Up Powder after years of research and local trials. Many similar products contain artificial coloring and dyes, but Big Up Powder is free of all of these unnecessary ingredients. For use in any growing medium. Big Up Powder is designed specifically for the first week and final weeks of the flowering period. Plants are..

£7.95

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Sticky

Foliar sprays are an easy way to ensure the quality of your fruits and flowers in all your favorite plants. A proper foliar spray should include a wetting and binding agent to equally distribute and adhere the spray onto the plant’s leaves. Humboldt Sticky is a premium sticking and wetting agent that has been extensively tested in Northern California with phenomenal results. Humboldt Sticky is formulated using premium ingredients which are simply unavaila..

£14.95

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Honey Hydro

Humboldt Honey Hydro is an excellent sweetener for all gardens. It promotes and facilitates the growth of beneficial bacteria and fungi in soil-less media, and dramatically enhances the quality of any plant’s fruit. For use in any Hydroponic system. Sugars are the fuel of the microscopic world, supplying the energy needed to drive biochemical systems. Our Humboldt Honey Hydro breaks down into the smallest possible sugars when dissolved in water, creating ..

£10.95

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Verde

It’s Spanish for green. Lush green colors and vigorous growth are what you can expect with Verde. Used as a foliar spray or as a growth catalyst for hydroponic or soil crops, Verde can help keep plants healthy throughout their life cycle. Verde is a premium growth supplement with 16% nitrogen, 1% available phosphorus, and 2% potassium, as well as iron, magnesium and other vital elements. This is a great blend for plants experiencing periods of accelerated..

£13.95

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Myco Madness

Myco Madness is a soluble powder which contains a biologically active package: 9 mycorrhizal species, 15 beneficial bacteria and 2 trichoderma species well-suited to a variety of media, soil conditions, climates and plants. Myco Madness contains mycorrhizal fungi that colonize plant roots and extend the root system into the surrounding media, greatly enhancing the absorptive surface area of root systems. Myco Madness can help in forming an essential link ..

£15.95

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Myco Maximum

Myco Maximum is a granular powder containing 7 species of growth-enhancing mycorrhizal fungi, proprietary ingredients, 11 strains of beneficial bacteria, and 2 trichoderma species. Myco Maximum adds organic matter and helps to break down nutrients and micro-nutrients present in your growing medium or soil which are necessary for plants throughout their life cycles. Mycorrhizal fungi increase the surface-absorbing area of the roots, greatly improving the a..

£13.95

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Royal Flush

Try Humboldt Nutrients Royal Flush today and experience the difference between a flush and a Royal Flush with a clean, sweet finish. For use in any growing medium. Royal Flush can be applied to all crops including vegetable crops, row crops, field crops, trees, vines, ornamentals, and gardens and landscaping. Royal Flush is a salt-eliminating, finishing solution for all plants growing in soil, potting mixes, soil-less rooting media, hydroponics and other ..

£6.95

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Snow Storm Ultra

A Humboldt County original This amino acid based product tricks the plant into thinking its heat stressed. The result is intense resin, fragrance and flavor production plus the well-known "frosted" look that growers love. We separated the Snow Storm from Purple Maxx and optimized it. No carbohydrates or sugar water. This is the real deal. An honest, one-of-a-kind product. The name says it all!..

£14.95

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Waterproof pH/EC PCTestr 35

Basic multi parameter measurements on the go is so easy! Eutech's Testr 35 multi-parameter series allows you to measure pH conductivity and temperature with just one handy instrument. Made to fit your pocket both in size and budget. pH Range: 0.0 to 15.0 pH pH Resolution: 0.1 pH pH Accuracy: ±0.1 pH EC Range: 0.0 to 199.99uS/200/1999uS/2.00mS to 20.mS EC Resolution: 0.1uS/1uS/0.01mS EC Accuracy: ±0.1 % Temperature coefficient: 0.0 to 10.0%/Degree ..

£171.95

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Professional Nutrient Management Kit

Kit includes: pHTestr 10 ECTestr 11 pH Buffer 4 pH Buffer 7 Conductivity (EC) Standard Replacement Batteries and Carry Case..

£241.95

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Waterproof EcoTestr EC High

The Eutech EcoTestr EC High comes with rugged, sturdy stainless steel pin sensors, giving you quick, reliable measurements in a wide variety of applications. Ideal for use in hydroponics and other water applications. Range: 0.0 to 19.90mS Resolution: 0.1 mS Accuracy: ±0.1 % (±0.2 above 10 mS) Calibration: 1 points Automatic Temperature Compensation: Yes Non-Volatile Memory: Yes Hold Function: Yes Auto-Off: 8.5 minutes after last key press LCD di..

£63.95

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Waterproof ECTestr 11

Combining the ranges of thee testers into one, the Eutech multi-range EC Testr 11 now measures a wider conductivity range. User friendly features such as simultaneous temperature display, auto-ranging option, adjustable TDS factor and automatic temperature compensation make EC measurement on the go quick and easy! Range: Dual Range 0.0 to 2000uS/0.0 to 20.00ms Resolution: 0.1uS/1uS/0.01mS Accuracy: ±1% Full Scale Calibration: 2 points auto 2 point ma..

£109.95

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Conductivity Standard

Solutions of a known electrical conductivity (EC), used to check and calibrate EC meters. This should be a regular procedure to ensure best results from the meter. Available EC standard solutions: 1.413 mS/cm and 2.76 mS/cm..

£2.95

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Conductivity Economical Pocket Tester CD611

Measuring electrical conductivity is the best way of checking the amount of salt or dissolved solids (TDS) in water. Milwaukee provides you with a range of pocket testers that will allow you to measure from very low to very high conductivity solutions. All EC/TDS testers compensate for the temperature variance automatically. The CD611 is a Conductivity tester specifically designed for water analysis. The calibration procedure is very simple and fast. Thi..

£61.95

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