20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 10 Pleated Plus Carbon 4 Pack pump Customers using fish waste nutrients

Customers using fish waste nutrients

All of the Roots Organics guanos are carefully sourced for quality and harvested with bat-friendly methods so you and your garden get performance with principles

Place the cover on top of your 6 inch cube and instantly block light allowing roots to flourish and prevent algae

With easy set up and removal

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 10 Pleated Plus Carbon 4 Pack pump Customers using fish waste nutrientsImportant 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,