Hey I have a goldfish and while I was cleaning the tank the container I put him in fell and the fish fell about 2metres. Red has appeared under his skin which has to be internal bleeding. I have isolated him in a separate tank and have set the temp to 22 degrees Celsius as he is a cold water fish and also put some calcium in the tank. Is there any other way I could help him? He is swimming normally but I'm worried he won't make it