16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil If the rejection % falls

If the rejection % falls under an acceptable level (typically 90%) it’s time to change the membrane

– AGGRESSIVE FEEDING/LATE BLOOM: 6 ML – 8 ML PER GALLON

It can also be used as a supplement to larger fixtures like the Fluence SPYDR or VYPR

extract its food value and expel the residue as worm castings

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 6 Pack bio soil If the rejection % fallsImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter