How do turtles live in fresh water or salt water?

In fresh water, as for how to raise it, it is generally raised. One meal a day. When eating, feed him. He moves when he is hungry, but he is either moving or hungry. One meal a day is enough, and sometimes it doesn't matter if you forget. Give it a hearty meal at the next meal. This is my way of raising turtles. I have raised them for several years, 67 years, and I am still alive. You can keep asking questions. I am happy to answer them.