6ddd20e8_Common_diseases_of_goldfish__Treatment
[Disease and Causes] Finrot Caused by Aeromonas, Pseudomonas or Flexibacter bacteria [Symptoms] Frayed fins, often with a pale pinky-white edge and some blood in the fin tissue. [Reason for Infection] The bacteria are present on most fish. Stress from poor water conditions usually triggers an infection. Nipped fins may become secondarily infected if water is polluted. Some wounds may also be attacked by fungus. [Action] Improve water conditions. Isolate nippy fishes. [Treatment] 
Treat promptly with a finrot or anti-bacteria treatment to prevent the further spread of the disease. Consider adding salt (1-3g/litre) to reduce the loss of salt by the fish. Ensure that water stays free of pollution during treatment.
Common diseases of goldfish
Treatment