17x20x1 MERV 13 AC Furnace Filters 6 Pack grow-systems-trays-reservoirs These fungi attach and construct

These fungi attach and construct a vast colonization of symbiotic associations inside and outside plant roots that are actually extensions (absorbent fibers) of the root zone forming thousands of access points which significantly enhance water and nutrient availability and absorption

Mixing it up (10-20 ml per gallon) doesn't require adding any other wetting agents

for heavy infestations

Adjustable Speed Dial

Decreases premature flower aging

17x20x1 MERV 13 AC Furnace Filters 6 Pack grow-systems-trays-reservoirs These fungi attach and constructNordic 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