The Add Back Kit (ABK) provides a simple approach to adding concentrated fertilizers or pH adjustors directly into your Under Current® system.

The Add Back Kit utilizes a patented Mazzei injector to pull concentrates directly into the system’s solution. The Add Back Kit uses the Under Current® system’s existing water pump and flow to naturally draw nutrient into the system via venturi action.

Safe and simple.

Features

• Easily Add Back Nutrients and pH Adjustors to Your System
• Avoid Shocking Plants During pH and Nutrient Adjusting
• Simple process, Just Turn a Valve to Initiate Add Back
• Adapts to any Under Current® System
• Can Also Be Used for Supplemental Aeration