Red Sea Reef Foundation A is a calcium and strontium complex designed to ensure balanced coral growth in saltwater reef aquariums. This supplement contains precisely blended salts of calcium and strontium, essential elements for the formation of healthy coral skeletons, ensuring they are available in the correct proportions necessary for optimal coral health and development. As part of Red Sea's comprehensive Reef Care Program, Reef Foundation A is used alongside other products to maintain ideal water conditions that promote vibrant reef life.