Tropic Marin Salt Mix is a premium reef salt specifically designed for creating pure, natural seawater in saltwater aquariums. Manufactured from pharmaceutically pure salts and based on the latest scientific analysis of tropical oceans, it effectively transforms fresh water into a near-identical replica of natural marine environments, providing an essential foundation for all marine life. This high-quality salt is completely free from synthetic additives, nitrates, phosphates, and silicates. It uniquely incorporates all 70 natural trace elements at their exact oceanic concentrations, utilizing Tropic Marin's exclusive "mixed crystal" technology. This innovative method ensures that trace elements remain fully usable and biologically available to organisms without precipitation or the need for chelates. The 200-gallon bucket weighs 55 lbs. Tropic Marin Salt Mix is best suited for discerning reef aquarists who prioritize providing the most authentic and healthy living conditions for their delicate fish, marine plants, and invertebrates. Its precise, scientifically-backed formulation supports successful keeping and breeding by establishing a true-to-life biosphere, guaranteeing a stable and thriving environment for your entire reef aquarium.