Kootenay Filter Pre-Filter 500SL | Air Filter Replacement Age Old Nutrients 109mm (regular + oversized)

109mm (regular + oversized)

Concealed Vacuum Airflow: Hidden ducts use 100% of the hood for even light

Use during the late bloom phase to support and enhance flower development

The clear eggs hatch into light yellow/green larvae and will begin eating 100 to 200 whitefly eggs per day

REI and PHI

Kootenay Filter Pre-Filter 500SL | Air Filter Replacement Age Old Nutrients 109mm (regular + oversized)Extend Filter Life with the Kootenay 500SL Air Filter Replacement Designed for SL500 filters without a flange, the Kootenay Filter Pre Filter 500SL blocks dust, debris, and larger particulates from reaching and clogging your primary filter. This replacement pre filter enhances air filtration efficiency, supports odor control, and reduces system maintenance over time. With a 16'' diameter, 20'' length, and compatibility with 6'', 8'', and 10'' flanges,