Treat and control algae growth and reduce your freshwater aquarium maintenance with API ALGAEFIX Algae Control. This revolutionary product is specially developed to control many types of algae including "green water" algal blooms and string or hair algae and it will not harm fish or plants when used as directed. Weekly doses of API ALGAEFIX Algae Control will control algae growth and reduce aquarium maintenance. Do not overdose. To treat algae add 1 ml per 10 gallons of water and repeat every three days until algae is controlled. Siphon or scrape any dead algae from aquarium. Use this aquarium treatment weekly to control algae growth and reduce aquarium maintenance. API ALGAEFIX Algae Control is not for use with freshwater crustaceans including shrimp crabs and lobsters.With API Aquarium products its easy to keep a beautiful saltwater freshwater or reef aquarium. For over 50 years API has been creating innovative research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe hospitable environment for fish such as tropical community fish cichlids goldfish and more. With API you can spend more time admiring your fish and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.