17x25x1 MERV 7 AC Furnace Filters 6 Pack complete-systems Solubilizes silicate and zinc while

Solubilizes silicate and zinc while siderophores chelate iron making them bioavailable to plants

Internal capacity markings

climates and greenhouse growers

Customizable grow data charts

Rigid shape does not fold over when watering or filling

17x25x1 MERV 7 AC Furnace Filters 6 Pack complete-systems Solubilizes silicate and zinc whileNordic 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