Instant Ocean Reef Crystals - Synthetic Sea Salt for Reef AquariumsThe premier choice of reef aquarists everywhere, Instant Ocean Reef Crystals are an enriched formulation that offers optimum effectiveness. Formulated specially for use in reef aquariums, Instant Ocean Reef Crystals contains essential ocean reef elements in concentrations greater than those found in natural sea water. Extra calcium is added to help ensure the growth of large and small polyp stony corals as well as coralline algae, and additional trace elements provide an added measure of vital nutrients. Vitamins ensure vigorous growth and survival of corals, anemones and other invertebrates in a captive environment. For an additional layer of protection and the health of your reef inhabitants, Instant Ocean Reef Crystals includes a metal detoxifier to neutralize traces of heavy metal often present in domestic water supplies.Instant Ocean is dedicated to helping you maintain the most beautiful, intriguing reef environments by keeping the inhabitants thriving and healthy!