13x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack grow-system/-trays/-reservoirs Known to survive temperatures over

Known to survive temperatures over 100° in field crop applications

Ionic Bloom delivers the essential elements to the roots of a plant in a more precise manner than all previous hydroponic formulations

Air-Cooled with a flange to attach your ducting directly to the reflector

Resistant to chlorinated water

Net Weight: 8

13x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 12 Pack grow-system/-trays/-reservoirs Known to survive temperatures overNordic 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.