Hey man, ya it was just probably stress from the move and then tinkering around with his tank. Sometimes my guys will sit in the cool end for weeks on end then eventually move over to the warm, sometimes I would move them being worried and they would just go back to were they were so I gave up trying to move them. If you want to see if hes hungry and give him an opportunity to eat you can unbury just his head and offer him some food, if hes hungry he will take it.