16x21x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Begin applications in early spring

Begin applications in early spring when the first leaves of host plants emerge — this is when newly hatched slugs from overwintered eggs are most vulnerable

and other particulate from entering filter

or a lighting controller

This symbiotic relationship increases the supply of nutrients to plants

16x21x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Begin applications in early springNordic 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.