The Aquaforest Strong ABCK set is a complete package of essential supplements designed to enhance and maintain the health of your saltwater reef aquarium. Each component—A, B, C, and K—contains concentrated minerals that are crucial for calcium uptake and overall water quality. Component A provides strontium and barium, while Component B supplies heavy metals like iron and manganese. Component C delivers iodide and fluoride, and Component K offers potassium. Together, these components work synergistically to support the growth of corals and other marine life by balancing critical elements in your aquarium’s water.