SVC, Tokala, Fighter, thanks.
He's still floating but for the moment at least he's floating upright. I don't think he's eaten anything I've left in there yet but I'm going to try to leave a pellet for him. He still can't dive but he tries every time I open the lid of his tank. He's kind of a skittery little dude.
Tokala, thanks for telling me about your guy. Now I know not to give up hope on this little fellow.
SVC, as soon as I can get him to eat, I think I'm going to try the medicated pellets like you suggest.
I was thinking of naming him Bobby or Buoy 'cause he just bobs like a, er, buoy but I kinda like McFloaty Floatsalot.