Honey Gourami injury

Question
Hi there. I am a rather experienced aquarist, have had tanks for nearly 10 years. Recently, I was observing my honey sunset gourami, female, and I noticed she had what looked like a bite mark on her left fin. She is normally in a 29 gallon tank with Black Skirts, Serpaes, Danios, a male honey sunset and Clown Loaches. The tank is about 2 months old, but the cycle is complete, no ammonia, no nitrites, and less than 20 nitrates. I've had her and the male for nearly 3 months. I netted her and placed her in my 10 gallon hospital/quarantine tank that has 2 neons, the other 4 died, 1 male guppy, 1 platy, and 2 albino corys. I want to add some aquarium salt to the tank to prevent infection of the open wound, but now that I have corys, which I just purchased 2 days ago and are quarantining them before putting them in my 29, I don't think I can do a salt bath for her without harming them. I've been told that corys can handle low doses of salt, but a dose that low will do next to nothing to prevent infection. Thanks for your time!

Answer
You are right about the cory's, they do not tolerate salt very well and you would be better off not putting them in the tank if you are going to treat her with the salt. As for the gourami, it is highly likely that the male bullied the female. It is not usually a good idea to keep just one female with one male, usually you should have a couple of females to one male. But never add more than one male to a tank, as they tend to get very aggressive. Chances are the injury is from the male, unless you have reason to believe it is something else. It would be the best case scenario if you can put the corys somewhere else and keep treating the gourami with the recommended does of salt, as this will as you pointed out help keep infection and disease from developing. If this is not possible, you can always just put the gourami in a safe tank, without bullies and without the male, and let her heal on her own. That is pretty much your choices. Assuming she heals completely, when you return her to the big tank make sure and get one or two more females if you plan on keeping the male, this will prevent furthur injury. Let me know if you need more help.