API AlgaeFix controls the main and most persistent types of algae in freshwater aquariums, and does so without causing harm to your fish or plants. You can use AlgaeFix as part of your aquarium maintenance routine, or to directly treat and control algae. Weekly doses of AlgaeFix will control algal growth and reduce aquarium maintenance over time. Do not use with freshwater crustaceans, including shrimp, crabs, and lobsters.

Package Description: 16 fl. oz. (473 ml)

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Active Ingredients: Poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride]: 4.5%

Add 1 ml (1/5 tsp) for each 10 gallons or 5 ml (1 tsp) for each 50 gallons or 50 ml (10 tsp) for each 500 gallons of aquarium water. Repeat dose every 3 days until algae is controlled. Siphon or scrape any dead algae from aquarium. Once algal growth is under control, add one dose per week. Weekly doses of AlgaeFix Marine will control algal growth and reduce aquarium maintenance.

For indoor aquarium use only. Keep out of reach of children.