22x24_1/4x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow System/ Trays/ Reservoirs you may notice insects with

you may notice insects with a whitish appearance

Paired with durable handles that make transportation easy

Slim vertical profile: Maximizes vertical real estate allowing greater production space

where they hatch and begin feeding on the whitefly

and no negative or positive air pressure interference

22x24_1/4x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow System/ Trays/ Reservoirs you may notice insects withNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition