Black Ops Replacement Pre-Filter 12 in x 48 in Black Garden Hygiene and Safety Black Ops filters have a

Black Ops filters have a built in flange and 2 pre-filters are included

And that's not all: balance-free ph perfect technology works around the clock to calibrate and adjust the ph for you

Monster Bloom is designed to increase the plant's ability to flower

spider mites

12 foot power cord and on/off switch allows for easy operation

Black Ops Replacement Pre-Filter 12 in x 48 in Black Garden Hygiene and Safety Black Ops filters have aUse 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.