This variety of Microbes is designed to promote Nutrient Availability & Plant Protection during the Bloom Stage
Bar spacing can be adjusted to optimize uniformity
• Required for photosynthesis and respiration
factory tested
MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800
21_1/4x21_1/4x1 Exact MERV 13 AC Furnace Filters 6 Pack lighting_accessories This variety of Microbes isNordic 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