16x21x1 MERV 13 AC Furnace Filters 6 Pack spl_fluence Surety Soil takes that microalgae

Surety Soil takes that microalgae and tops it off with an NPK of 3

arrives as a compressed cube

non-slip plastic handle ensures visibility in the field and a secure grip in wet or muddy conditions

Up to 25 WD-1 can be connected to a single Aqua-x

NSF certified food safe

16x21x1 MERV 13 AC Furnace Filters 6 Pack spl_fluence Surety Soil takes that microalgaeNordic 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