Black Ops Replacement Pre-Filter 12 in x 39 in Black Rockwool though those natural levels provide

though those natural levels provide only slight benefits to plants

Collect pollen while using TrimBin with our innovative screens

Incredibly cost effective

Color Temperature 2000 K

Insecticide made of natural Pyrethrin and canola oil

Black Ops Replacement Pre-Filter 12 in x 39 in Black Rockwool though those natural levels provideUse these for a pre filter on you Black OpsNutrients Carbon Filters. Match the pre filter to your Black OpsNutrients Carbon Filter size. Helps to extend the life of your Black OpsNutrients Carbon Filter by keeping dust and other particles out. The black color does not show the dirt as much.