Why is my koi fish nipping fins? How to stop it and treat injuries?

Question

Can fish medicine cause problem to fish? One Koi fish is nibbling the dins of another koi fish. What to do?

Angel Alvarado, LVT · Accepted Answer

If it is an inappropriate medication, then it may cause more harm than good. Fin nipping can be caused by having too small a tank or incorrect ratio of males to females to name a couple reasons. Consider separating the one being nipped to give it opportunity to heal. Maintain pristine water quality to aid in recovery. Minor damage will heal on its own. Moderate or severe damage may require antibiotics to treat or prevent infection.

Why is my koi fish nipping fins? How to stop it and treat injuries?

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