Thanks guy!

Yeah sounds like the reasonable facts and reassurance I was looking for! I will definitely check him out thoroughly for any bad signs. And for sure I'll keep that water bowl clean.

It only ever has maximum an inch of water in it anyway as it evaporates decently quickly. So his head was just barely submerged but definitely under.

I wonder if maybe he has stuck scales in his nose ..? That are right right now just before he sheds? Would I be able to see any in there, or would it look abnormal at all?

Thanks again