Just like the past few days, I woke up to this. He pretty much hangs out in there at least 50% of the day. Based off of what T_Sauer said, I checked out the only non-submerged area (The neck / Head,) and there are no extra spots in that area. So I guess no mites.

So it must be because the water bowl is smaller than its hide. I'll be putting him in a 6qt tonight with a smaller hide.