Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 4 Pack Led Another approach is to veg

Another approach is to veg and bloom plants only in this block

push-button calibration with auto buffer recognition

Be sure to lower your nutrient levels to compensate and avoid overfeeding

top-grade BPA-free black plastic

How should BotryStop WP be stored

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 4 Pack Led Another approach is to vegImportant 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 3 8 and 5 1 4 inch depth filters,