Red Sea NO3: PO4-X is a unique complex of carbons that are used by nutrient reducing bacteria. Each carbon in the complex is utilized by different strains of microorganisms while ensuring the specific Carbon: Nitrogen: Phosphorus ratio required for each stage. The Red Sea NO3: PO4-X complex includes other organic-bonded elements that are important stimulators in each stage of the reduction process. These metal and non-metals elements ensure steady bacterial propagation, complete nitrate reduction to nitrogen gas as well as the absorption and utilization of phosphate by the bacteria. Red Sea NO3: PO4-X Biological Nitrate and Phosphate Reducer 5L