For a salt water tank, it is crucial to maintain nitrogen levels in balance with phosphorous for optimal growth, and coloration of both macroalgae and corals. A typical nitrate test will show all forms of nitrogen being added by Reef Nitrogen. Reef Nitrogen is ideally suited for use with an aquavitro sentia dose doser to maintain nitrogen at consistent concentration based on your aquariums unique demand. Reef Nitrogen is easily dosed manually as well.