20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 1 Pack coco-cubes 3/4 in and 1 in

3/4 in and 1 in polyethylene tubing is completely opaque to prevent algae growth and is gray in color

Bluelab Pro Controller automated pH and nutrient controller gives you full control of reservoir pH

Place the cover on top of your 6 inch cube and instantly block light allowing roots to flourish and prevent algae

a full 6 inches wider than the rest

After adding and stirring in each nutrient

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 1 Pack coco-cubes 3/4 in and 1 inImportant 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,