I have one 6" RBP in my 75gal tank. He has no other tankmates. I would like to add SOMETHING to the tank but am unsure of my options. I have read the recently posted thread concerning tankmates, but none sound that great. I have heard stories about people keeping weird things with them but only when they were added together at same time to a new tank. Any ideas? Are more RBPs out of the question? Cichlids?