Tetra Pond Medica Bacteria & Fungus 250ml treatment is a highly effective treatment against all bacterial and fungal infections in pond fish. Symptoms of a bacterial or fungal infection include: Loss of skin & scales Break out Open wounds Ulcers Fin disorders Slowed or accelerated movements Shakiness Cramps General darkening Protuberant bellies Patchy fins Use the Tetra Pond Medica Bacteria and Fungus treatment safely in your pond to treat all or any of the above.