28x28x1 MERV 12 AC Furnace Filters 6 Pack trays Ultra thin and unfolded designed

Ultra thin and unfolded designed is optimized for easy mounting for every level grower

Stays extremely cool

Mix 5 LBS of substrate for every 3 LBS of colonized grain

Botanicare's pH Up consists of a 29% concentrated potassium hydroxide solution that has an extremely low level of phytotoxicity and does not contain salts or chlorides

room-to-room

28x28x1 MERV 12 AC Furnace Filters 6 Pack trays Ultra thin and unfolded designedNordic 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