Black Ops Replacement Pre-Filter 12 in x 39 in Black Plant Success Specifically formulated for the green

Specifically formulated for the green vegetative stage of growing plants

If your water contains 30 to 50 ppm Calcium

Your agricultural crops also need to load up on carbohydrates during their production phase

Easy handling with built in handles

Black Ops Replacement Pre-Filter 12 in x 39 in Black Plant Success Specifically formulated for the greenUse 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.