20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Garden Hygiene and Safety ABS Plastic

ABS Plastic

root drench every 5 days

Magnum) with heavy Magnesium and Sulfur will keep a plant's energy factories optimized and the B1 helps relieve the stress caused by high performance bloom formulations

Acre or More Applications - 5-30% of the rates listed above

20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Garden Hygiene and Safety ABS PlasticImportant 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 20x25x4 filter