did a bit of research on whether people have kept congo tetra's with JD's and/or Oscars on the web. Some people seem to be doing it ok, others don't recommend it. I just purchased 6 (almost) full grown ones from MA for £40 and introduced them to their new tank mates. The Oscar has taken a particularly well to his new friends, a little too well, I hope I haven't just purchased the most expensive feeder fish ever! Got the QT on standby as they are really beautiful fish and would be a shame to lose even one I'm hoping the Oscar will lose interest soon!