So my Gourami was attacked by another fish today.....half his tail and fin are missing . I have taken the other fish back to the shop, and I have put the injured fish in a separate space away from the others. He seems to be just laying on his side. Whenever he trys to swim he cant seem to stay straight......he looks like he has now turned a shade of black on his head and back......is there anything else I can do to give him a fair chance of survival????