16x22x1 Exact MERV 12 AC Furnace Filters 12 Pack Growing Media This interlacing allows for deeper

This interlacing allows for deeper light penetration and a 800 umol min/1000 umol Max light comverage throughout the conopy area

Features: Low frequency

Each step complements the next

though you can also begin a wide range of feeding programs right out of the bag

Each filter is machine packed and includes a pre-filter

16x22x1 Exact MERV 12 AC Furnace Filters 12 Pack Growing Media This interlacing allows for deeperNordic Pure MERV 12 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, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different