20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack plant-support this formulation is ideal for

this formulation is ideal for a variety of growing uses and is designed to meet crop requirements for certified organic growers

Double-ended system delivers higher PAR value with excellent uniformity

These perfectly sized durable nylon trellises feature industrial grade plastic hooks that easily attach to any diameter pole

The blend supports better aeration and drainage

It also features a triple ceramic junction in the outer junction and the conical pH sensing portion is made with low temperature glass

20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack plant-support this formulation is ideal forNordic 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.