This ensures an airtight seal that will keep particles out and exhaust flowing one way
carbon A/C air filters help to remove gases
seed germination
Great for commercial or residential use
Use at a rate of 1 tsp per 5 gallons when buds are forming and continue with every fertilizer application during the blooming cycle
28x34x1 MERV 13 AC Furnace Filters 6 Pack Cone Filler This ensures an airtight sealNordic Pure MERV 13 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, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200