8_7/8x19_1/8x1 MERV 13 AC Furnace Filters 6 Pack Pumps & Irrigation Test on a small area

Test on a small area first to ensure no damage

NPK: 8 - 0 - 0

Knockbox 3/100 Base

and 1000 ppm calibration solution

Elite 91 FLOWERS contains a carefully calibrated balance of phosphates

8_7/8x19_1/8x1 MERV 13 AC Furnace Filters 6 Pack Pumps & Irrigation Test on a small areaNordic 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