Instant Ocean Reef Crystals -- Synthetic Aquarium Salt for Reef Aquariums and Salt Water Aquarium SuppliesThe premier choice of reef aquarists everywhere, Instant Ocean Reef Crystals are an enriched formulation that offers optimum effectiveness for the maintenance of reef aquatic habitats. Specially formulated for use in reef aquariums, these reef crystals, which serve as a synthetic type of aquarium salt, contain essential ocean reef elements in concentrations greater than those found in natural sea water. Meanwhile, extra calcium is added to help ensure the growth of large and small polyp stony corals as well as coralline algae. Furthermore, these crystals feature additional trace elements that provide an added measure of vital nutrients for the aquatic life within your reef aquarium. With vitamins that ensure vigorous growth and survival of corals, anemones and other invertebrates within your captive reef environment, these reef crystals make for an excellent way to care for your reef habitat. For an additional layer of protection and the health of your reef inhabitants, these special reef crystals include a metal detoxifier to neutralize traces of heavy metal often present in domestic water supplies.As a trusted authority in salt water aquarium supplies, Instant Ocean is dedicated to helping you maintain the most beautiful, intriguing reef environments by keeping the inhabitants thriving and healthy!