17x21x1 Exact MERV 10 AC Furnace Filters 6 Pack Grow Strong Use 2 – 3 teaspoons

Use 2 – 3 teaspoons (10 – 15 ml) per gallon

Designed to pump up your blooms

500K 47″ x 18½” x 2½” 22 lbs 48” x 21½” x 4” 23 lbs 1

60 – 90 LPH Flow Rate

eliminating the need for additional Cal-Mag supplements

17x21x1 Exact MERV 10 AC Furnace Filters 6 Pack Grow Strong Use 2 – 3 teaspoonsNordic Pure MERV 10 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, allergens and other contaminants are removed. MERV 10 furnace filters are comparable to HVAC filters with the rating of MPR 900 1000. While different companies