16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack cococube Keep your trays in a

Keep your trays in a warm

Be sure to start off with a lower dosage rate and gradually work up to the full strength dosage rate based on your plant’s growth response

providing flexible installations

Providing an average of 1000 umol/s of usable photon flux

16x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack cococube Keep your trays in aImportant 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. If you are replacing a 4 3 8 depth 16x20x4 filter