16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 10 Pleated Plus Carbon 2 Pack rockwool Ionic Bloom delivers the essential

Ionic Bloom delivers the essential elements to the roots of a plant in a more precise manner than all previous hydroponic formulations

Feed regularly with an organic plant food

It also allows for automatic operation to start or close when faucet is turned on or off

root radiance is ideal for greenhouses

16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 10 Pleated Plus Carbon 2 Pack rockwool Ionic Bloom delivers the essentialImportant 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,