15x17x1 Exact MERV 13 AC Furnace Filters 6 Pack reflectors and grow lights Optimal humidity is 50% or

Optimal humidity is 50% or greater

building plant resilience

Milky Spore has been trusted by organic growers and turf professionals for decades

Temperature chart of the actual pH value at various temperatures printed on each bottle

Dimensions: 26"L x 13

15x17x1 Exact MERV 13 AC Furnace Filters 6 Pack reflectors and grow lights Optimal humidity is 50% orNordic 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