I’m somewhat new to having saltwater tanks again and my first time having a PBT. I’ve have this guy for about 6 months now. Everything was good till about a month ago. He started to have white cotton like things on his fins and I treated him for that and cleared up. Now for like the past week it looks like ich. I have clowns in the tank with him and the clowns are looking perfectly fine. Been doing a copper treatment and raised the water temp to 85 but nothing seems to be doing anything. He’s still eating but not as much as he used to and seems to be hiding more now then his normal swimming around the tank. Any help or tips will be greatly appreciated to save my PBT. I attached some pics to try and help.