The most common causes of fin rot

are poor water quality and improperly-low water temperature. Overcrowding the tank, feeding outdated food, overfeeding the fish, and moving or handling can also cause stress that leads to fin rot.

Why is my fish tail ripped?

Fin rot is a common symptom of a bacterial disease that can affect a variety of fish, from Betta fish to goldfish. It is often caused by a dirty tank, poor care, or exposure to other fish who have infectious diseases. Your infected fish may have fins that appear to be torn and ragged, as if they are rotting away.

How do you fix a ripped betta tail?

When to Do Nothing

If you do not see signs of fin rot, you can leave a betta with a torn fin to heal on his own. If your betta lives in heated filtered water, the fish will likely heal quickly. Some sources indicate that feeding foods with B vitamins like Daphnia may improve fin regeneration.