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Mitigate HAIs with patented UV-C pathogen killing 99
away from direct sunlight
square-wave digital ballast designed specifically for the 315W high intensity ceramic halide lamp
After the growing season is over
Calcium and magnesium fertilizer supplement designed to prevent and correct problems that can arise from deficiencies
20x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 1 Pack grow-systems-trays-reservoirs Mitigate HAIs with patented UV-CImportant 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 20x20x4 filter
