API Melafix is a highly effective treatment for the treatment of wounds, abrasions, red sores and a great variety of other ailments that affect aquarium fish. This treatment is suitable for use in marine water 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.