Tetra Pond MediFin Fish Treatment is a highly effective Pond Fish Treatment that kills disease causing bacteria, fungii and parasites. Tetra MediFin has a combination of active ingredients which effectively control a wide range of fish pathogenic organisms and also helps to combat water cloudiness all in one complete treatment. MediFin also reliably disinfects the water without affecting any useful "filter" bacteria and therefore it is ideal as a regular preventative measure against disease outbreaks.