Hi everyone, I recently rescued a black moor goldfish from a neglected tank. when I got him he was lethargic and I decided to not put him in the tank with the other goldfish. He has been in a 2 gallon quarantine tank for a few weeks and has been doing great. From the begging he had fin rot and minor swim bladder. I treated him with water changes everyday and feed him peas. I also added salt to the water. He was doing very well however I noticed this week he has been lethargic again. I did start giving him regular food again and stopped the peas. I noticed today that he is on his side. This is the worse he has been since I got him or ever worse. I don't know what to do can anyone give me advice. I have been treating him with salt and have hand feed him two peas. Any advice would be appreciated.