Are guppies compatable with a rainbow shark? I have 1 rainbow shark in my 15 gallon. He is a little bit of a bully but he won't pick on anyone with "friends". He seems to like picking on other loner type fish but nothing serious.
He's only about 3 1/2, but he'll be moving to a much bigger tank when he grows. I won't be moving for another few months but when I do I'm getting a nice 40 or 55 gal. (no room in this apartment When I first started buying fish I had no idea of the size he could grow to, I would have taken him back after I found out but he was my first fish, and has been through a lot (trust me!..lol) He's survived a few first time fish keeping mistakes during his few months here. Anyways do you think they'd be compatable, or not a good idea?