Fritz ProAquatics RPM Marine Salt - 200 GalFritz ProAquatics Reef Pro Mix Complete Marine Salt is a high quality sea salt blend for reef aquariums containing all essential major, minor and trace elements necessary to create a healthy marine environment. Manufactured using only top quality raw materials, Fritz Aquatics' trusted researchers and marine scientists have formulated this sea salt blend to mimic all of the elements of natural sea water utilized by living marine and reef animals. RPM