Yeah his fins are really nice and I've looked them over carefully and I see no signs of fin rot, ich, or anything else. He's also quite the little piggy, I think he'd eat everything if I poured all the pellets into the tank.
I had a scare with him about two weeks or so ago because the ammonia levels in my water were really high but I got them brought back down and he was doing awesome. In the past few days though, he's resorted to spending a lot of time at the bottom of the tank, just hanging out.
It's weird, but he seems almost happier without a heater in the water but I know that can't be true because the temp is like 60 - 70 F without the heater. I just don't know how to please the little bugger!