I have a feeling that when the lights go out he'll be a snack for that rtc...... I'd put him in a qt tank, with some melafix and pimafix. Make sure you have an air stone and bump the temp to around 82 or so. If you don't want to use either of those, use aquarium salt and dose as the box tells you to. But make sure if you bump up the temp you have good airation in the tank as warmer tanks rob o2 from the water.
first of all, take him out there or the rtc will make him a snack.
well, try to put some aquarium salt, taking care of the temp and water params.
it looks like he beat up in something.
try to take better shots for a clear vision on whats going on.
and good luck with him, hope it gets better