I have a group of 24 Odessas in a 150, they’re a nice group of active fish, I’m not sure I’d consider them the centerpiece though. They don’t really bother anything else as far as nipping goes, just each other. I decided to try an and add a chocolate cichlid and blue acara with them, right now the chocolate isn’t big enough to potentially eat them. I’m really happy so far, fingers crossed long term.