Salt - 175 galRed Sea Salt is the ideal mix for fish, invertebrates, soft corals, and low nutrient SPS reef aquariums. Red Sea Salt is created by blending natural solar evaporated salt (NaCl) harvested from the waters of the exotic Red Sea Reef together with other fine elements resulting in a homogenic and balanced salt mix that is as close to real reef water as possible. Each individual crystal of the harvested salt contains 45 of the minor and trace elements