It is a violation of federal law to use this product in a manner inconsistent with its labeling. Add 14 drops (1 ml) of Algaefix for every 10 gallons or 1 teaspoon for every 50 gallons of water. Repeat dose every three days until algae is controlled. Siphon out or scrape any dead filamentous algae from aquarium. Once algae growth is under control, add one dose every 7 days. Weekly doses of Algaefix will control algae growth and reduce aquarium maintenance. Caution: Do not use Algaefix with crustaceans, including crabs, shrimp, freshwater shrimp and freshwater lobsters. Caution: Harmful if swallowed or absorbed through the skin. Avoid contact with skin, eyes or clothing. Wash hands thoroughly with soap and water after handling. NOTE- This product contains a chemical known to the state of California to cause cancer. First Aid: If in eyes, hold eye open and gently flush with water for 15 minutes. If swallowed: call a Poison Control Center or doctor immediately for treatment advice.