11 1/4x23 1/4x1 Exact MERV 13 AC Furnace Filters 12 Pack X Nutrients bloom It is critical that plants

It is critical that plants not only get sufficient nutrients but also in the appropriate ratio

Black mold

stainless steel construction for superior corrosion resistance

Certification - TL

on field crops

11 1/4x23 1/4x1 Exact MERV 13 AC Furnace Filters 12 Pack X Nutrients bloom It is critical that plantsNordic Pure MERV 13 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200