HydroGenius liquid algaecide is designed to help you take care of and maintain your swimming pool. This liquid algaecide has a 10% concentration to help prevent and control algae in swimming pool water. The product has a pH level of 5-8. The economical packaging contains 3.6 litres of liquid algaecide. The algaecide is a preventative and not effective for visible algae. Use as directed.