Seachem's Marine Salt" is specifically designed to replicate the saltwater marine environment. It provides every major, minor and trace element necessary. This ensures that even the most delicate marine fish, invertebrates and plants will thrive. Marine Salt's" enhanced alkalinity ensures a more stable pH than competing salt blends. Marine Salt" possesses excellent solubility characteristics and will provide a clear, ready to use solution in only a few minutes. Marine Salt" is a convenient and easy to use one-part formula that is ideal for mixing either small or large batches of saltwater. Utilizing state of the art production facilities ensures a consistent and uniform particle size that will not separate in packaging or shipping and will provide a consistent saltwater mix every time. Aquarium Use Only! Keep Away from Children!