20x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack pumps-and-irrigation-supplies the concentrate is mixed with

the concentrate is mixed with the water

The Orcon Grub Control (7 million) (GC-R7M) are microorganisms that contains beneficial nematodes

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Drying Rack Specs:

(Propagation Pots sold separately)

20x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack pumps-and-irrigation-supplies the concentrate is mixed withImportant 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 20x20x4 filter