Karen, I thought about that, too...after it happened.
![whistle {:-P;;](https://www.worldwidewatergardeners.org/forum/Smileys/smilies_smf/whistle.gif)
We just haven't been having much rain the last few years, and the tub overflowing overnight never really occurred to me.
![Roll Eyes ::)](https://www.worldwidewatergardeners.org/forum/Smileys/smilies_smf/rolleyes.gif)
I've had to dump out excess water before, but not very often. Believe me, if I ever have a RES outside in a tub again, it will have some overflow holes.
I don't really think they'll come back. Turtles are a bit like snakes, in that they don't have a lot of brainpower/loyalty/attachment to their keepers. One of them used to pop his head up begging for food, but that was about the extent of it. I enjoyed them while I had them, but now I just hope they manage to find their own food after all this time. I think/hope their instincts will kick in and they will be OK.
![Smiley :)](https://www.worldwidewatergardeners.org/forum/Smileys/smilies_smf/smiley.gif)