Hi lovelace...Its not so much hearing recommendations..but the usual..."you cant keep them together"or "dont worry about it.its not like they will eat each other..this pairing is temporary .seeing i just got my new girl a few days ago.and only have one tank right now..but i am going to get the second tank within the next day or two..I also believe that single animal single tank is the way to go.just seeing what the majority thinks....thanks