Hydrofarm Active Air Pre-Filter for ACCF398, 8" x 39" Cutting Edge Solutions monitor and record CO2 levels

monitor and record CO2 levels over an adjustable period of time

Its full spectrum light enhances the color of ornamental flowering indoor plants

greater flowering and better fruit set for all indoor and outdoor plants

Extend the effective life of your Active Air carbon filter with a corresponding Active Air pre-filter

• ½" elbow fitting

Hydrofarm Active Air Pre-Filter for ACCF398, 8" x 39" Cutting Edge Solutions monitor and record CO2 levelsExtend the effective life of your Active Air carbon filter with a corresponding Active Air pre filter. These pre filters block larger particulate matter such as dust and dirt from clogging the working surface of your filter. This keeps your carbon filter operating at top efficiency for much longer. When the pre filter becomes visibly dirty and discolored after several weeks, simply replace it. Check our large collection and find the size that matches