Red Sea's NO3:PO4-x is a part of their Algae Management Program that combines highly effective, controlled biological reduction of nitrates and phosphates for all reef and marine aquariums. Between testing NO3 P04 and dosing the proper additives, nutrients in the aquarium can be easily managed with no undesirable effects. NO3:PO4-x helps promote naturally occurring nutrient-reducing bacteria that already exist in your aquarium. 
Reduces and maintains NO3 and PO4
Cost Effective
100% Reef Safe (do not overdose)
Nitrate and Phosphate reduction in a controlled setting