16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack Cone Filler Automated filter change warning

Automated filter change warning

Versatile Soluble Seaweed Extract can be sifted with soils to create custom blends for planters or added to the hydroponic reservoir

- Plug sense adapter in a timer or controller: when adapter is powered up

offering flexibility for all types of growers

Chickadees

16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack Cone Filler Automated filter change warningImportant 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