21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack Plant Support 01% Ammoniacal Nitrogen

01% Ammoniacal Nitrogen

Bluelab Pro Controller automated pH and nutrient controller gives you full control of reservoir pH

making every system unique and one of a kind

and lighting recommendations

The spectrum is comprised of 410

21x27x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack Plant Support 01% Ammoniacal NitrogenNordic 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