13x20x1 Exact MERV 8 AC Furnace Filters 12 Pack additives Add 2-5 mL of Grow

Add 2-5 mL of Grow B per gallon of water during the vegetative growth phase

making it the go-to choice for certified organic operations and eco-conscious growers who refuse to compromise on results

Integrated double-jacketed design allows lamp to be open rated

Designed to drive either halide or sodium bulbs properly with separate wire leads

3 Bag Extractor Bag Kit is the most advanced on the market

13x20x1 Exact MERV 8 AC Furnace Filters 12 Pack additives Add 2-5 mL of GrowNordic Pure MERV 8 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 and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters