I just purchased a baby Arowana. It should be here Tuesday. Their shipping him/her out Monday overnight. I really like Jack Dempsey fish. Their are a bunch of babies on aquabid. Can I have an Arowana and a Jack Dempsey together. If the Dempsey is to small, I can keep him in my 20 gallon until he's a little larger. I just wanted to Make sure in the long run they'd be ok together.