18x27x1 MERV 14 AC Furnace Filters 6 Pack Tents & Tarps Colonizer Lid: Attach the Colonizer

Colonizer Lid: Attach the Colonizer Lid after inoculating the substrate

and the controller unit does the rest

It is the ONLY proven and tested air disinfection system that eliminates airborne contaminants according to USP 800 standards

Reduces watering and leaching of nutrients

Biodegradable

18x27x1 MERV 14 AC Furnace Filters 6 Pack Tents & Tarps Colonizer Lid: Attach the ColonizerNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.