16x22x1 Exact MERV 13 AC Furnace Filters 12 Pack cloning-&-seed-starting This product also contains a

This product also contains a healthy dose of Calcium (Ca)

Good 2 Grow trays and reservoirs are both made of durable high-impact white ABS plastic with UV resistance for improved longevity

Used for close shearing of sheep wool

The Pre-Evolution is recommended if more than 150 gallons per week is produced

nighttime only or both

16x22x1 Exact MERV 13 AC Furnace Filters 12 Pack cloning-&-seed-starting This product also contains aNordic 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