20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack reflectors and grow lights This mode allows the user

This mode allows the user to set an emergency temperature limit that will turn off the CO2 generator until the grow room temperature is reduced by 10°F

This premium blend was formulated for the discerning Grower

Reduces water use

mammals and omnivores requiring high protein

but once it does it kills and eliminates all life stages by:

20x25x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack reflectors and grow lights This mode allows the userImportant 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 20x25x4 filter