42" long tub, aspen substrate, fresh water, new hides, UTH on the hot side, temps are 90-92 on the warm side, and 86-87on the cooler side. Handled daily, but i wait 3 days after he eats to handle him. I was taking him out for his daily handling for the first time after he ate, and saw it.
It does not smell bad, and that is why i didn't think it was a regurg, but you can see a tail in there, so maybe he just didnt digest it well?