Effective against skin discoloration ulcerous wound, inflammations, mouth fungus, cloudy eye, pop eye, fish bite and fin rot. A broad spectrum anti-bacterial remedy, effective against ulcerous wounds, mouth fungus, fin rot, reddish patches on the body and physical injuries. It is suitable for use in hospital/quarantine fish tanks. A temporary yellow shading may appear during this product application. BACTONIL Ã¢ÂÂFW is generally prescribed for all common diseases of flowerhorn, arowana and discus in combination with PARACIDOL-FW or STRESS HEAL BACTONIL Ã¢ÂÂFW user attention: Remove carbon and zeolite from filter. Replace them after 10 days of treatment. The usage shall be on day 1,2,3,5,7 or as advised by your aquatic professional. Stop treatment when the symptoms disappear. Do a 25% water change daily if necessary.