My rainbow shark is chasing everything in my tank and just killed a great looking angle. Now he's going after my GBR. Is there anything I can do to settle him down and wonder why he's doing that? Never acted like that in the past and now he's acting like a crazy fish!!!!!
rainbow shark
- Thread starter gatorjon
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jcolon
Aquarium Advice Addict
Welcome to AA!!
How big is your tank and how large is the Rainbow? Is the tank planted with caves / logs? These kinds of "sharks" get very territorial as they get larger, which is a large planted tank (55+ gal) with caves and logs (plastic) are recommended so they have a territory the can claim.
HUKIT
Aquarium Advice Addict
The tanks a touch small but unfortunately fish sometimes need to be rehomed due to aggression.
jcolon
Aquarium Advice Addict
+1 with Hukit ... may need to either get a larger tank .. or return / rehome the Rainbow. It's in their nature really. My 3" Redtail Shark chases the Barbs he started the tank with during feeding. He will chase them one by one from one end to the other. Thankfully it's only during feeding cause it's really my son's fish(a gift from his grandfather), so rehoming the RTS is not really an option.
Also Rainbow / RTS's can get up to 6 inches long ... so yours still has a least one more inch to go.
HUKIT
Aquarium Advice Addict
Neither of those fish belong in that small of tank. Favorite fish or not if it's killing other tankmates it's time to go or get him a tank of his own.
jcolon
Aquarium Advice Addict
That's a tough one
.... guess you have an excuse to get a larger tank
Maybe try getting an ornamental cave at an LFS ... see if it claims it and just hangs out there. It may be your Rainbow has no territory to claim .. so it's claiming the whole tank ... and woe any fish who crosses into the tank
Not sure if a green terror or yellow lab will work .. I'm not familiar with those fish
Hopefully another member will be able to advise on that. I heard / read somewhere that keeping Rainbows with other fish of their size may curtail aggression ... unfortunately in my tank, the RTS's one of the big-boys and the left side of the tank is mainly its territory during feeding.
jcolon
Aquarium Advice Addict
Guess that answers my questions on green terror / yellow lab.
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