11 3/8x11 3/8x1 Exact MERV 13 AC Furnace Filters 6 Pack lighting_accessories Testing for phytotoxicity and compatibility

Testing for phytotoxicity and compatibility is recommended before widespread use on plants or mixing with other products

3 x Flora Clip 2

1 g accuracy

If you are looking for cleaner

It can also improve root mass growth up to 20%

11 3/8x11 3/8x1 Exact MERV 13 AC Furnace Filters 6 Pack lighting_accessories Testing for phytotoxicity and compatibilityNordic 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