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Reef•Basis Magnesium is a high purity magnesium in dry form, designed to safely raise the magnesium level in marine aquariums, providing essential magnesium for invertebrate growth and to regulate the balance between calcium and carbonates . It contains no acetate, EDTA, polygluconates and is over 4 times as strong as many competitor's products because it is made from anhydrous salts, not hydrated salts.
