I have 5 red bellies and one of them was attacked and got a pretty nasty wound right in front of its dorsal fin. This happened wednesday and it is now saturday. Since then I have added salt to the tank and raised the temp to 82 degrees. This morning I turned on the lights and was amazed at how fast it has healed in the past 3 days and thought to myself that it should be almost 100% in about 5 more days. 10 minutes later he was bit on the SAME SPOT!!! It was not as bad tho but it bled a little. I immediately started dumping food in the tank in hopes that if the rest of the fish had full bellies that they would leave it alone. I plan to continue to do this for the next week until it is healed. Should I seperate them? I know in the wild, only the strong survive and any weakness is a good reason to make a meal. What else do you all suggest? Anyone else deal with piranha with nasty bites?