My show fish has seriously hurt itself. It scrapped itself on both sides of its body and face. Perhaps it got stuck going through an opening in the live rock too small for it. It's now hanging out in the middle of the tank listless. Im concerned it will die of a baterial infection secondary to its wounds. I dont know how I'd catch it if I need to treat it; it is not interested in food. I dont have enough antibiotics to treat 900 gallons of water, and I dont want to crash the tank for the other inhabitants. Attached is an image.