Rainbow Shark Aggresion?

is it normal for rainbow sharks to chase each other because mine chased the other one was kinda darker in coloration they are abt 2 and a half inches, had them with my bgk but now I moved one over to my koi and goldfish tank, I am increasing the size of the goldfish tank soon, so any thoughts on diffusing the aggression cause the other guy has torn fins and all

 

Totally normal. They are aggressive and territorial. Separate them would be the best option. Or like a 75+gallon tank with lots of hiding places/sight breaks.

 

Ohh ok cool, but will they nip bgk, koi, fancy goldfish or corydoras

 

As they mature they are aggressive towards eachother more than others unless they are really small tank mates with them. That's from my personal opinion. Luke said before your best to house 1 shark per tank unless you have a 75 gallon plus with enough hiding places and sight breaker's for the bullied shark to hide..

Like said before* silly phone autocorrect it from like to luke for some reason

 

Ok thanks

 

Mine will chase some of my other fish but it hasn’t ever nipped anyone. Totally normal from everything I’ve read.

 

thanks for the information man