Fortunately, goldfish have a great ability to regenerate damaged fins and tail quite fast, as well as their scales. While my ranchu "half tail" looked horrible, it is already healing, making a week old damage less noticeable each day. Although, it may not regenerate to its original beauty and the new tissue may not be as translucent, it will look normal and become functional again.
|Healing tail side lobe of a nisai ranchu|
The main key of the healing process is to have strong, well fed fish and VERY clean water. I don't use any medication or prophylactic treatment. Quality of the water is crucial and that is what I am focused on.
So, next time your goldfish turns up with damage fins or tail, give it a time and concentrate on maintaining exceptionally clean water. Your fish will be happy again in no time!