The Tropic Marin Pro Reef Aquarium Sea Salt is a premium-quality solution for creating an environment in your saltwater reef aquarium that closely mimics natural seawater conditions. This sea salt is made from pharmaceutically pure salts and contains all 70 trace elements found in the ocean, ensuring a balanced and healthy habitat for marine life. It optimizes calcium and magnesium concentrations to support coral growth while being free of synthetic additives, nitrates, and phosphates that could harm your reef system. Tropic Marin has over 50 years of experience and uses rigorous testing to guarantee their sea salt mixes perfectly with water, offering aquarium hobbyists a reliable product.