API Pond, 16 OZ, Algaefix Algae Control Solution, Effectively Eliminates Green Water Algae, String & Hair Algae, Blanketweed Algae & Others Controls Green Water To Keep Pond Water Clean & Clear In Ornamental Ponds & Water Gardens Use As Directed To Keep Water Safe For Fish, Pond Plants, Surrounding Wildlife & Pets Dose Every 3 Days Until Algae Is Controlled& Then Treat Weekly, Bottle.