Red Sea offers a premium sea salt mixture based on natural sea salt harvested from the waters of the exotic Red Sea by solar evaporation techniques. Red Sea Salt is enriched with other refined minerals to faithfully replicate natural seawater for your aquarium.Used for over 10 years by hobbyists and professionals alike, Red Sea Salt has become famous for its favorable effect on invertebrates. Red Sea Salt is the only salt formulation offered today that is derived principally from a living sea.Suitable for marine fish and invertebrates from every sea and ocean Reaches a stable, natural pH shortly after mixingNo nitrates or phosphatesProduced by a small batch process to ensure homogeneity of salt mixtureEvery batch is biologically and chemically tested for quality controlSuitable for a small water change or a complete new aquarium set-upCan be mixed to any desired salinity 11.75 ozProduces 2.6 gallons of saltwater