I have a group of peacock gudgeons in my 16g with a very definite 'top fish' male. Other than some chasing there haven't been any serious problems until now when I noticed one of my females has some significant tail damage. All the other fish in the tank are fine so I assume it's from the big male. She has decent color and swimming doesn't seem to be a problem but I'd like to get her out of the tank to heal. I have a 5g with a few Endlers fry that I was planning to move out. My main question is how should I treat the damage?