The Red Sea Reef Foundation A Calcium (CA) is a specialized liquid supplement designed to maintain optimal calcium levels in saltwater reef aquariums, crucial for the healthy growth of corals and other marine life. It provides a balanced mix of calcium and strontium, essential elements that contribute to the formation of coral skeletons. This product ensures that these key minerals are present in the correct proportions, promoting vibrant coral health and development. Reef Foundation A Calcium is ideal for reef hobbyists looking to maintain stable water conditions, ensuring their aquarium inhabitants thrive in a balanced environment.