18x22x1 MERV 12 Plus Carbon AC Furnace Filters 12 Pack Pest and Disease Control all-in-one hydroponic system that is

all-in-one hydroponic system that is excellent for plant isolation research

But these are optimum conditions

Non-toxic - Safe to use on plants in and stage of growth

Clones - 1 sachet per plant

18x22x1 MERV 12 Plus Carbon AC Furnace Filters 12 Pack Pest and Disease Control all-in-one hydroponic system that isNordic 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.