Gonna need to setup a hospital tank or isolate the injured fish. To promote quick and effective healing, keep nitrates ultra low, add aquarium salt (1 tablespoon for 5g of water) use melafix if there are open wounds. Also reduce stress, this is where a hosp tank works good, just keep the lights low and the activity around the tank to a minimum. You'll only need to keep the injured fish there a week or less.
Oh ya ignore the first few posts of your thread
Oh ya ignore the first few posts of your thread