21x22x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack propagation trays Square box underneath:

Square box underneath:

leading to constant issues with pH and nutrient “hotspots

Dimensions: 19

Higher humidity is generally necessary with higher temperatures

XTrays grooved FLO-THRU channels keep plants well-irrigated

21x22x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack propagation trays Square box underneath:Nordic 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.