Hi! Thanks for the welcome.

I didn't get a picture and cleaned the tank the moment I noticed the worms, but honestly, they were too tiny for any camera I have to focus on them. Maybe a quarter of the size of a grain of rice. I don't think the frog would even have been able to see them enough to eat them. Does that sound like a parasite?

Thanks for the tip on shedding - it has been much drier than usual here this summer, so that may be wearing on him.