<p>250G Specially formulated mixture of carbonates, sulfates, and chlorides of sodium, magnesium, calcium and potassium with all necessary minor and trace minerals to approximate Rift Lake water chemistry&#046; Designed to provide natural water chemistry to African cichlids and other rift lake fishes without significantly raising pH&#046; Compatible with and designed for use with A F Cichlid Buffer for pH control and A F Cichlid Rift Lake Trace Elements&#046; Contains no phosphates, nitrates, silicates or organics to pollute the system&#046; (Note: competing products usually contain very high levels of silicates which encourage diatom (algae) growth on the tank walls! This product does not!) A F Cichlid Chemistry will also benefit most American cichlids whose waters are hard and have high pH&#039;s above 7&#046;8!</p><ul></ul>