16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 2 Pack X Nutrients but allow for time to

but allow for time to dry between treatment and harvest

Made of high molecular weight HDPE

Drain your reservoir and pumps at least once a week to prevent any salt build-up

With your safety in mind

16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 2 Pack X Nutrients but allow for time toImportant 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,