16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 4 Pack cloning-&-seed-starting OxiPhos is formulated with a

OxiPhos is formulated with a unique combination of Hydrogen Peroxide and Phosphoric Acid that allows it to work both systemically and on contact

Indoor Cultivator

gradually warming up your plants just as Mother Nature does

and don’t leave behind a residue

When used alone as an amendment

16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 4 Pack cloning-&-seed-starting OxiPhos is formulated with aImportant 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,