Unlike the snakes, a wide variety of foods should be offered, and they will eat commercially prepared foods. There are many commercial diets available. Most meet the turtle's nutritional requirements, but do not feed this exclusively. Live feeder fish, earthworms, and meats make good supplements as do leaves of romaine or kale, and several kinds of chopped vegetables. Many kinds of vegetables may be rejected, but there are usually a couple of kinds that individuals find more appealing than others.
Calcium supplements are a good idea and needed for young turtles especially.
Calcium blocks added to the water are useful, as is adding supplements to the food. Adults turtles are best fed a few times a week, and youngsters should be offered food every day. I have not bred this species in captivity, and my information on this subject is mainly taken from de Vosjoli, 1992. Cool them into the 50's, underwater, for a few months. Place the pair together and in a month make sure the female has loose soil for nesting.