Cool turtles, but trust me, get the snappers out sooner rather than later lol. The first sign of aggression could be fatal for your other turtles. I used to keep my Alligator snapper with other turtles in my early herping days...I saw him and a African helmeted turtle both go for the same piece of food...the Alli swallowed not only the food, but the helmeted turtle's head that was holding it. Fortunately the snappers jaws closed on the front of the shell, so I could pry his mouth open and the helmet could escape...from that point on, the snappers have always lived by themselves...