API Pond AlgaeFix algae control effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) in ponds containing live plants and fish. API Pond AlgaeFix algae control is fast-acting, controls algae growth, controls the formation of new algae, and helps resolve algae problems. Registered with the EPA, API Pond AlgaeFix algae control controls many types of algae in water gardens, ponds, and ornamental fountains containing live plants and fish. Use Instructions To ensure accurate dosing, determine pond volume before use. Do not overdose. Add 1 teaspoon (5 ml) for each 50 gallons or 0.25 cup for each 600 gallons of pond or fountain water. Thoroughly mix into pond water by adding near the pump outflow, waterfall, or aeration device. It can be mixed in a bucket and dispersed evenly around the pond. Repeat dose every 3 days until algae is controlled. Once algae growth is under control, add one dose per week. Weekly doses will control algae growth and reduce pond maintenance. Do not use with freshwater crustaceans including shrimp, crabs, and lobsters. Before using, make certain that the pond has vigorous aeration, i.e., a fountain or aeration device to avoid fish loss due to low oxygen levels. When algae is controlled and removed by the filter or settles to the bottom of the pond, the oxygen level may drop to harmful levels if adequate aeration is not provided. In warm weather, pond water carries much less oxygen. Therefore, when using during warm weather and high water temperatures, vigorous, 24 hour aeration is required for the duration of the treatment. Do not shut off pond pumps and aeration devices at night. Ingredients Poly [Oxyethylene (Dimethyliminio) Ethylene (Dimethyliminio) Ethylene Dichloride]; Other Ingredients pH Balance 5.8 - 6.8 pH Storage Instructions Store in a cool, dry place Safety Warnings Harmful if swallowed or absorbed through the skin. Causes moderate eye irritation. Avoid contact with skin, eyes, or clothing. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet. Caution Keep out of reach of children. Do not use with freshwater crustaceans including Shrimp, crabs and lobsters.