18x36x1 MERV 13 AC Furnace Filters 6 Pack pest-and-disease-control strong root systems throughout the

strong root systems throughout the growing season

999% sanitization of food contact surfaces

Synthetic chelates can raise the salt-index in a biochemical system and raise the potential for salt build-up and toxicity

When using Base A and B with silicate products

The GC-315 delivers the highest efficiency and closest spectrum to actual sunlight in the commercial horticultural industry

18x36x1 MERV 13 AC Furnace Filters 6 Pack pest-and-disease-control strong root systems throughout theNordic 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