I am trying to convince my mom to let me get a 20 gallon tank, but she wants to know what I could put in it. I have a ten gallon community and a five gallon guppy sorority/fry tank. She says "Well I want to know what fish you would put in it. I want something different"... I want to get a more exotic species of fish for it. I have looked at rams, and they are definitely an option.