27x27x1 MERV 13 AC Furnace Filters 6 Pack controllers 2 x PotPro™ | Drainage

2 x PotPro™ | Drainage x T (unit)

and people when applied according to label directions

and can be added to the hydroponic reservoir with confidence

Control the light cycle in your greenhouse & hoop house

27x27x1 MERV 13 AC Furnace Filters 6 Pack controllers 2 x PotPro™ | DrainageNordic 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