13x20x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack pest-and-disease-control Pre-soak starter grow medium up

Pre-soak starter grow medium up to 15 min prior to placing new cuttings

Speed up the flowering and fruiting stage

(2) Bulk Head Screens

Calcium for the base of every feed

13x20x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack pest-and-disease-control Pre-soak starter grow medium upNordic 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.