I havent tried feeding him yet. It can swim a little. He was in a 55 gallon but i moved jim to quarantine tank with little bit of water in itFrogs seem pretty able to survive a lot of physical trauma, but the fuzziness and redness suggest secondary infections of fungus and/or bacteria. Those are not good. If the wound/infections are minor, and your tank conditions are pristine, it may recover without aid. But I’d bet against it.
Can it swim? Is it eating? How deep is the tank, and what size (volume)?