API Melafix Freshwater Fish Care Solution – 8 oz – Aquarium Water CareAPI MELAFIX Freshwater Fish Bacterial Infection Remedy 8 Ounce Bottle Heals bacterial infections and repairs damaged fins, ulcers and open wounds. Contains natural, botanical tea tree extract to quickly and rapidly help fish. Helps treat newly introduced fish to reduce the risk of disease outbreak in freshwater aquariums. Use daily for a week when treating infections and for 3 days as a preventive when adding new fish.