Strontium is essential for marine life in reef aquariums as it supports bone growth in fish and the formation of aragonite by corals and other calcium-secreting organisms. This Brightwell Aquarium Strontion supplement provides a highly concentrated source of strontium, ensuring that your tank's inhabitants have access to this crucial element at levels found naturally in seawater. With over 50% greater strength compared to many competitors, it offers reef builders the support they need for robust growth and health. This product is free from unwanted additives like EDTA or gluconate, making it a pure supplement that enhances water quality without introducing harmful substances.