20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 1 Pack tents-/-indoor-greenhouses Initial Lumens of lamp: 2

Initial Lumens of lamp: 2

Used for close shearing of sheep wool

pH the solution to the proper range for the media being grown in

Fungus Gnats

What does Ferocious do

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 1 Pack tents-/-indoor-greenhouses Initial Lumens of lamp: 2Important 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,