21x23_1/2x1 MERV 12 AC Furnace Filters 6 Pack disinfectant 2 gal 3 mm HGB7GAL

2 gal 3 mm HGB7GAL 9

or 5 — 100 per plant

Internal usable width is 43

You can use Grow-Cubes in any size pot and in many different growing systems

Optimum results

21x23_1/2x1 MERV 12 AC Furnace Filters 6 Pack disinfectant 2 gal 3 mm HGB7GALNordic Pure MERV 12 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, smoke particles, virus carriers, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different