21_1/4x23_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack hydro-systems It eliminates algae by covering

It eliminates algae by covering the top of the media

Athena Mildew Control formula deactivates the growth of spores

the area to be treated should be watered before application and for several days after application

increases vigor

Excellent in hotter growing areas

21_1/4x23_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack hydro-systems It eliminates algae by coveringNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters