30x30x1 Exact MERV 13 AC Furnace Filters 6 Pack grow-light-reflectors Once any settings you create

Once any settings you create have been saved

A larger hole can also be cut in the cover to act as a port for adding nutrients

These active ingredients are listed as food grade materials

Mycorrhizal Stimulation: Worm activity promotes beneficial fungal networks that dramatically improve water and nutrient uptake

30x30x1 Exact MERV 13 AC Furnace Filters 6 Pack grow-light-reflectors Once any settings you createNordic 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