20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 1 Pack trays The fungus actively grows with

The fungus actively grows with and protects roots if the soil pH is maintained between 4

which makes it particularly suited for applications in hospitals

OK-35624-29 for pHTestr 2

These ions attach to airborne pollutants

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 1 Pack trays The fungus actively grows 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. We also carry 4 7 8 and 5 1 4 inch depth filters,