20x25x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack grow-system/-trays/-reservoirs without releasing byproducts into your

without releasing byproducts into your water supply

Use the included mounting bar to place it on any open wall space or install caster wheels to set it on the floor

lime and ruse from equipment used in ponds

Verde Fire Bloom is a natural solution-grade dry-powder formula that when mixed with water makes an excellent fertilizer for a variety of indoor/outdoor plants

20x25x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack grow-system/-trays/-reservoirs without releasing byproducts into yourImportant 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