This product helps to raise pH level until it reaches the recommended level for the species of fish. A ph level of 7.0, neutral, is recommended for community aquariums of more than one species. Contains no phosphates. Safe for use with live plants. For freshwater aquariums only. Use two drops per U.S. gallon of water. Repeat as necessary until pH reaches desired level. Do not raise pH more than 0.2 in any 24 hour period.