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I have had my tank set up for quite some time but I have been having an issue with a Zebra Dino, he keeps chasing all my other fish relentlessly, I am thinking of removing him from the tank. Not sure if this chasing is stressing the other fish this is why I am thinking of removing him. Any suggestions?
A bit more info would help. How many zebra danio are in the tank, and what size tank? What other fish? Is the chasing confined to just the zebra danio, or the other fish. Is any physical contact like nipping fins being made?
Chasing is normal behaviour for shoaling fish (tetra, danio, barb, rasbora) and sometimes it is a fine line between normal and excessive. And the latter does cause stress, and that can lead to health issues. When i have answers to the above, I should be able to pin this down more for you.
Okay, I have one Zebra Danio, 2 Rasbora, 5 neon's and 5 Rummy nose. There is no biting of the fins that I can notice, the only think I have noticed is that the Zebra chases the rummy nose's and the neon's which are smaller in size, it does not chase the Rasboras which are about it's size. The tank is a 35 gallon planted.
The rasbora, neon tetra and brilliant Rummy nose tetra are the same, shoaling fish. The rasbora at two should definitely be increased to 6 or 7; I am assuming this is the Harlequin Rasbora. [Shaded names indicates this species is in our profile, click the name for the profile info.] While five for the neons and rummys is better than one or two, it would be a good idea to increase the rummys especially; this species always is better with larger numbers, say 9 or more. You have the space. The neons are OK, or you could add a couple, up to you. You can read the profile for more info on each species.
Now I'll come back to the zebra. If you increase the rasbora and rummys as i suggest, this is going to limit space. Rather than increase the zebra, I would suggest removing the one fish and re-home it. But if you really want this species, getting more might solve the chasing--or it might not. The stress of being alone might have caused this, and sometimes this alters the fish's behaviour and it does not change. It is something we can't predict accurately.
Thanks for your prompt response! I had a school of 6 Zebra Danio and 6 Harlequin Rasbora, I had them for almost a year and for some strange reason some just died off and I was left with 1 Zebra and 2 Rasbora. In the school of 6 the same Zebra still chased others around, but I will take your advice I will re-home the zebra and increase the number of rummy nose and rasbora, I actually have 6 neons not 5, should I increase the number of neons as well?
You could add some substrate fish if you like. A group of corys (here again, shoaling fish, so minimum five with corys), or perhaps for something more unusual a Whiptail Catfish (fine alone).
Will do THANKS!!!
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