nadarasjewel

Forgive me in advance, I'm a beginner.
But I have a small school of 6 zebra danios in a 10g tank. One of them seems to be a huge bully terrorizing all the others and all five of the others have little to no tail fin left.
For the moment I have removed the one that's being a bully and put him in a 2.5g tank...but I feel bad because I know they're schooling fish.
Is he okay to be with the other five still? should i try him in a new tank with new tank mates? Suggestions would be greatly appreciated.

Amanda

Welcome to fishlore!
it may be because they're in such a small space together.
Do you have a larger tank that you could move them all to?

agabr123

welcome to fishlore!

removing him was a good idea, if you rearrange things in the tank and then re-introduce him after a couple days that could definitely help with the aggression.

i agree with amanda that the 10 gallon is pretty small for all six of them and is probably the source of most of the aggression .

nadarasjewel

thank you for the welcome
i have called a friend and she is going to take them and add them to her community tank.
i guess my betta will be living all by himself now lol

Lucy

Moving him like you did and rearranging the tank before putting him back might help.
Is the Betta still in the same tank?

Edit: Ooops, I typed slow. lol
Glad to hear they're going to another tank and being separated from the Betta.

nadarasjewel

yes, the betta's been living with the danios for almost six months now problem free. i just started to notice tails being nipped the past few days. thank you for the suggestions.