20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack tents-/-indoor-greenhouses some growers place the spray

some growers place the spray stake near the edge of the pot

Round hemmed neck that lays flat

Root per gallon of water and apply to seedlings

Environment Low Gas Density

Absorbable silica is known to strengthen plant cell walls

20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack tents-/-indoor-greenhouses some growers place the sprayImportant 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,