Over at my buddys house we have a 125 gallon setup with 5 RBPs all around 4-5". I added 3 Exodons to the mix which are now around 3 inches. The tank is pretty bare with some plants in the mix and some nice current from a powerhead. Now, I have 3 Oscars that are about the same size as the RBs. Do you think they could co-exist well with them? I want to try it but I am very worried about the beautiful fins on my oscars. They are all "show" quality and wouldn't want something happening. Do you think it would be worth it? Or would the piranhas just tear their fins up. Is there anything I can add to the tank so the oscars have a place to call their own? All comments and suggestions welcome!