What should I do if my Betta fish picks on other fish?

  • Author: admin
  • Filed under: Fish
  • Date: Jul 30,2009
Sparrabeth asked:


I recently added my Betta fish (Betta splendens) to a community tank with five other fish. Two head and tail light tetra (Hemigrammus ocellifer), two neon tetra (Paracheirodon innesi), and some type of algae-eating catfish (we got him from a friend, so we don’t know what kind he is).

Normally Betta fish should be kept in a solitary tank, however they really only tend to attack other Bettas or fish with bright colours, or long fins. So I recently moved him to my 10-gallon community tank, because I previously kept in a glass ‘goldfish’ bow, but it was difficult to keep the water levels balanced, rather cold, and he started to show signs of Fin Rot.

When I first moved him into the tank, he was shy and somewhat skiddish. We called him a big baby because he would freak out and hide whenever someone would go near his bowl, so I wasn’t surprised that he stayed away from the other fish. However the next day, when I got home from school, I saw that one of the Head and Tail Light Tetras had a bit missing from his upper caudal fin, and my Betta was viciously chasing them around the tank, nipping at them whenever they got too close.

I know they are not ideal tank mates, however I had hoped that they would just ignore each other. Yet for the next two days since then, the Tetras are wary of the Betta, yet he hasn’t attacked them anymore.
But I’m afraid it might happen again. Is there anything I can do that will prevent this?
…wow sorry for all those typos.
EDIT :: Just an update - I decided to keep him with the others, and he hasn’t attacked them since that once time. I think he was trying to just exert his authority, so now they ignore each other, although the Head and Tail Light fish are wary of the Betta still. But they give each other space, and so I think I will keep them together until there is another physical attack.

djordje

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