17x20x1 MERV 13 AC Furnace Filters 12 Pack HPS For use on any plants

For use on any plants

• Compatible with 8" air ducts

The yields speak for themselves — we're not going back

so it can be applied to fumigated and unfumigated soil

Concentrated pH adjustment liquid

17x20x1 MERV 13 AC Furnace Filters 12 Pack HPS For use on any 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