API Melafix is a highly effective for treatment of wounds, abrasions, red sores and a great variety of other ailments that affect aquarium fish. This treatment is suitable for use in freshwater aquariums without effecting the biological filter,pH level or even water colour, Dosage: 5ml treats up to 38 litres / 8.4 gallons, Suitable for the treatment of; Red sores,wounds, Pop eye; Body Slime Fin and Tail Rot Mouth Fungus.