Kootenay Pre-Filter 660SL | Air Filter Replacement Humic Acid and will not replace one

and will not replace one late in bloom

Enhanced root growth and plant vigor

and any space requiring precise humidity control

Automatically turns off after 5 minutes

The aluminum housing resists dust and splash

Kootenay Pre-Filter 660SL | Air Filter Replacement Humic Acid and will not replace oneImprove Air Quality with Kootenay Pre Filter 660SL The Kootenay Filter Pre Filter 660SL is a high quality replacement filter designed to protect your carbon filter and ventilation system by capturing large airborne particles before they reach the core filter. Its 12 diameter and 26 length ensure a snug fit for the SL660 model without flange, making it a vital component in maintaining indoor air quality and maximizing the lifespan of your air filter