20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 10 Pleated Plus Carbon 2 Pack Grow System/ Trays/ Reservoirs Using Humboldt Nutrients Natural line

Using Humboldt Nutrients Natural line provides reliable crop-quality and quantity harvest after harvest

Clones/Cuttings:

• Safe to use with any nutrient line

New density + new hydrophilic technology = better water distribution and root development

36 x PotPro™ | 3 Gallon

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 10 Pleated Plus Carbon 2 Pack Grow System/ Trays/ Reservoirs Using Humboldt Nutrients Natural lineImportant 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,