17_1/4x23_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack Paleo Bloom formulated for use during the

formulated for use during the fruiting/flowering phase

Regular flanges come in 4"

you also have root zone issues that need to be solved

especially beneficial both for home growers and commercial growers

strong cells

17_1/4x23_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack Paleo Bloom formulated for use during theNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters