21x22x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack disinfectant This is extremely useful for

This is extremely useful for growers looking to reuse their growing substrate because it breaks down the dead matter left behind after harvesting as a usable food source for your next crop

It is designed for boosting phosphorus levels during all phases of plant growth

They will fit any standard 1020 (10" x 20") trays

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21x22x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack disinfectant This is extremely useful forNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.