Hello, I recently got a RES since I have taken care of water snakes and lizards before. I thought I would get a turtle. I got him yesterday and so far he has shown no interest in basking or eating. His water temperature is 77 degrees, his basking temperature is just over 90. I have a UVb bulb and a filtration system.
The first day I tried to feed just pellets, today I tried pellets, green leaf (not iceberg) lettuce, and shrimp. He doesn't give the food a glance and has not come to bask. He doesn't seem terribly frightened. He swims from one side of the tank to the other and sits for awhile. Could it be stress? I have read as much as I could about the issue and I really haven't found anything talking about new RES not eating except with environment issues, I believe my setup is correct but please let me know if it is not.
Thank you.

