17_3/8x35x1 MERV 14 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION When mixing with any phosphorus

When mixing with any phosphorus additives (like Elite 91 FLOWERS)

It is what frees up phosphorous for plant use

7-gallon reservoir

insert stem pointing away from your body into an appropriately sized notch

2 flow meters- incoming and outgoing

17_3/8x35x1 MERV 14 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION When mixing with any phosphorusNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.