20x21x1 Exact MERV 13 AC Furnace Filters 6 Pack water-filtration Increase porosity in growing media

Increase porosity in growing media allowing more air flow and drainage

Mounts horizontally or vertically to prevent backflow and debris from entering ducting

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

and is suitable for all plants

Podospheara leucotricha

20x21x1 Exact MERV 13 AC Furnace Filters 6 Pack water-filtration Increase porosity in growing mediaNordic 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