20x25x2 Pleated MERV 14 Air Filters 3 Pack Air Purification The 1 hour on in

The 1 hour on in between off period fools the plants that stay in vegetative growth state

Add RootWeb to starting mixes when sowing seeds and add to potting soil when planting or transplanting to encourage strong roots

Designed for consistent results in commercial growing facilities

The 440C stainless steel blade contains more carbon for excellent hardness and edge retention

Get more ballast for your buck with the SG ballast

20x25x2 Pleated MERV 14 Air Filters 3 Pack Air Purification The 1 hour on inNordic 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.