Currently I have 2 7 inch Brycon dentex in a 100 gallon along with a bichir and a bellycrawler pike cichlid. For those of you that dont know, Brycon dentex are a schooling characin native to south America. They reach around 16 inches, very active, visible teeth, and the most aggressive fish I've ever owned. I'm thinking that they may be compatible with 2-3 red belly piranha of a smaller soze since i read that red bellies can be housed with exodons. Ive also owned exodons and their behavior is almost exactly the same as my Brycon. Does anyone else think this will work? Or will I just end up with red bellies in my tank eventually?