Foundation Elements - Powdered SupplementsIts all in the balance SKELETAL ELEMENTS is a blend of all of the corals foundation elements of coral skeletons: Calcium, Magnesium, Strontium & Carbonate, with the addition of Potassium, Bromine and Iodine in the unique ratio required by corals. All of these elements need to be available in balanced proportions for positive coral health and growth. Red Seas SKELETAL ELEMENTS is a uniquely formulated powder supplement containing all of the elements of