So you need to take out filter media especially in hospital tank. Leave the fish in there for a week min. If not complete and total clear of ick in the hospital tank in a week try another. The temp raise is a good idea. Don't change the water till a week unless the pH gets really off. Filter...
Sounds like the swim bladder is messed up and that means he's probably dying, move him to the medic tank and give him a few days if he perks up put him back in the regular tank. I bet he's a gonner though