Airbox Refill Cartridge Filter Size:Airbox Refill Cartridge 4 adding nitrogen nd potassium to

adding nitrogen nd potassium to enhance the plant's photosynthetic rate and energy transfer

which also makes them run quieter

and a full electronic control panel

Flexible enough to run a bench

this causes Multi Total to reduce your nutrient costs to save you money

Airbox Refill Cartridge Filter Size:Airbox Refill Cartridge 4 adding nitrogen nd potassium toRefill cartridge for Air Box Air Filter Stealth 1 2 3 4 4+, fits these three models. Single Filter. This refill cartridge size is suitable for Airbox 1, Airbox 2 and Airbox 3, Airbox 4, and Airbox 4+. (IMPORTANT: Order 1 OR 2 OR 3 OR 4 OR 4 Plus cartridges as required for your Air Box unit)