20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack tents-/-indoor-greenhouses with the added benefit of

with the added benefit of large vapor clouds

tight inter-nodal spacing

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

Absorbable silica is known to strengthen plant cell walls

Root per gallon of water and apply to seedlings

20x25x5 (4 3/8) Honeywell/Lennox Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack tents-/-indoor-greenhouses with the added benefit ofImportant 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,