Seachem Cichlid Lake Salt is chemically sound blend fo salts designed to replicate the natural environment of Cichlids. It contains all physiologically essential elements such as magnesium, calcium, sodium, potassium, and includes trace components such as iron, aluminum, and iodide. It does not contain harmful or unnecessary ingredients such as nitrates, phosphates, arsenic, lithium, or cadmium. Although the major Rift Lakes contain basically the same mineral salts, they do so in greatly differeing concentrations. Cichlid lake salt is formulated so that dosages vary depending on the lake of origin, and need only be added when setting up an aquarium or when conducting water changes. Dose as directed.