Makes tap water safe for fish. Neutralizes chlorine, chloramine. And heavy metals harmful to fish. Enhances natural, protective slime coating of fish. Complete formula works in seconds. Water conditioner. Principal Ingredients: Sodium Hydroxymethane Sulfinate, Polyvinyl Pyrollidones, Organic Hydrocolloids, Organic Chelating Compounds. This Product Is Not A Medication And Is Not Intended To Be A Substitute For Any Medication. 16.90 Oz Bottle 16.9 OUNCES