Black Ops Replacement Pre-Filter 12 in x 39 in Black Grow Lamps supplying all major NPK with

supplying all major NPK with any nutrient system

The GrowLab Horticultural Grow Room has all the features you could ask for - and more

allowing the user to choose the best water flow option for their needs

A natural source of nitrogen and minerals

potassium sulfate

Black Ops Replacement Pre-Filter 12 in x 39 in Black Grow Lamps supplying all major NPK withUse 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.