My wife bought a 1 inch long turtle in New York City Last Saturday. This sent me scrambling to learn about turtles.
One of the first things I learned was that there is a federal law prohibiting the sale of turtles under 4 inches in length.

I searched for and found the regulation and learned that there is no problem in owning the turtle

, just a problem for the person selling the turtle if caught.
Next I found a picture of the turtle and so learned it was aquatic and that a PH of 7.0 and water temp of about 80F was preferred by the Red-Eared Slider. So, my next logical leap of thought was to put him in my 10 gallon tank until I can make better arrangements.
So there he is swimming around with four of my breeding mollies. Sometimes I find him hanging on the divider. He seems to be longing for a taste of my baby fish on the other side. But don't worry, he won't get them. I'm not raising feeder fish. I just caught him sleeping between the divider and the plastic container I put in there so he would have a place to surface. I have been leaving the lights on in this tank now in the attempt of having his surface area warmer than the water temperature. I opened the lid and his eyes popped open. He started turning his head toward me as if wondering what was happening.
Now I think I will get some additional lighting and something better for him to surface onto and a submersible heater so that I can house him in the 10 gallon tank until he out grows it. I am considering putting him in my 55 gallon tank once he grows an inch or two. However, I am concerned that my convict chiclid will bother him (or the rainbow chiclid or firemouth I am planning to get). Does anyone know if I can mix him with these kind of fishes?
Has anyone ever put a turtle with their fish?