Biologically ideal magnesium supplement for reef aquariums, Some corals and coralline algae use magnesium, in addition to calcium and strontium, in the formation of skeleton structure, The addition of BIO-MAGNESIUM to the marine aquarium restores the crucial magnesium/calcium ratio to its natural seawater concentrations, ensuring optimal skeletal growth, Contents:, Salts of magnesium, calcium, sodium, and potassium and 70 trace elements, Key Benefits:, Contains a combination of magnesium and minerals to promote essential biochemical processes in the aquarium, Magnesium for accelerated skeleton growth of corals and calcareous coralline algae, Maintains the natural ionic concentration and the pH value of the reef tank water, No unnatural by-products, No phosphates or nitrates, Measured amount of magnesium in a truly ionically balanced formula, SKU: RYLHC6330