20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 12 Pleated Plus Carbon 4 Pack nutrient-combo The ONA Storm is specifically

The ONA Storm is specifically designed to be used with ONA gel

Just add water – This soil has everything already in it

Beetles (including Darkling and Hide Beetles)

while maintaining structural integrity

Eliminates ''Hot spots" and ''shady edges''

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 12 Pleated Plus Carbon 4 Pack nutrient-combo The ONA Storm is specificallyImportant 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,