20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack Aeromixer and rapid stem and shoot

and rapid stem and shoot development are among the recognized benefits of using this kelp extract

The KDF-85 media is specifically engineered to target chloramine and heavy metals — contaminants that standard carbon filters often miss

Accessories sold separately

Grow Stage MICROBES are a specific group of beneficial bacteria and fungi formulated specially for the Grow (vegetative) stage of plants

Contains no genetically modified organisms (GMO)

20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack Aeromixer and rapid stem and shootImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,