Posted: Sat May 29, 2010 11:15 am
It would be much better to keep them separated for now. Get them their own set-up and let them grow some. Turtles that have a big difference in size shouldn't be placed together until their more equal in size. If your one cooter needs a tank upgrade, adding two more turtles, even hatchings, is further crowding things, and may need to bullying. (Ideally you also want to quarantine them for at least 3 months to make sure they're healthy.)
Why is your mom getting you two more turtles when the space you have for one is inadequate?
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-