And that is why at that size you would maybe go solo or use a divider to test their attitude before that happens. I would never just toss a rd/midas in with others
yea, thats pretty much what Red Devils do. Had you done a little research before you went and bought it, youd know that neither of the fish you have (or the JD in the tank as well) are compatible with a Red Devil, especially in what appears to be a 55 or 75g tank.