20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack plant-support You must use the TMHDT104

You must use the TMHDT104

Double-ended system delivers higher PAR value with excellent uniformity

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

Comes in a bottle designed to keep air and light from damaging the solution

2 x Electrical Cable Socks 3 inches diameter

20x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack plant-support You must use the TMHDT104Nordic 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.