Until yesterday I had 8 Exodon Paradoxus (Bucktoothed Tetras) and 1 pictus cat. The bucktooths never messed with the pictus and kind of just chased each other around. Yesterday I added a paired convict couple and a spotted rapheal cat. The rapheal is not bothered at all. The convicts actually tried to settle where the pictus had taken refuge but they quickly were ran out by the pictus cat(did not know they were so aggressive). The pair of convicts I have seen chasing the exodons and also a couple exodons chasing them. The convicts seem to be doing ok, but I guess I will see in the long run. I am going to run by and pick up a few more hiding places today probably.