21 1/2x23x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers and authored Marijuana Grower’s Handbook

and authored Marijuana Grower’s Handbook

molybdenum and manganese for an extra micronutrient boost

mold spores and other contaminants are removed

Faster Germination

This instrument is supplied with a non-clogging double junction pH electrode as well as a rugged conductivity probe that will withstand even the most aggressive environments

21 1/2x23x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Environmental Controllers and authored Marijuana Grower’s HandbookNordic 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.