Nutrafin Aqua Plus - Tap Water Conditioner makes tap water safe for tropical fish by neutralizing chlorine, chloramine and undesirable metals. Aqua Plus contains U.S.-patented PHE (pure herbal extract), which effectively reduces stress and prevents inflammation and other undesirable conditions that can arise from scrapes, torn fins and abrasions. Aqua Plus is a complete tap water conditioner that improves aquatic environments for tropical fish. Size: 30 mL (1 fl oz) DOSAGE: To remove chlorine: 5 mL treats 38 L (10 U.S. gal) To remove chloramine: 10 mL treats 38 L (10 U.S. gal) To protect scales & fins: 10 mL treats 38 L (10 U.S. gal) Double quantity for saltwater aquariums. Other sizes available: - A7927 Nutrafin Aqua Plus - Tap Water Conditioner, 120 mL (4 fl oz) - A7928 Nutrafin Aqua Plus - Tap Water Conditioner, 250 mL (8.4 fl oz) - A7929 Nutrafin Aqua Plus - Tap Water Conditioner, 500 mL (16.9 fl oz) - A7930 Nutrafin Aqua Plus - Tap Water Conditioner, 2 L (2.1 qt)