I have a small pond in my backyard with two baby RES turtles, are there any other reptiles i could add in?

I live in southern california so the climate is very good, i also have the water temp. at 78 degrees. Are ther e any reptiles like firebellied toads i could add in with the baby turtles? The small pond has land around it and any accomodations i would need to make for whatever reptiles i add i will make. The reptile pond gets plenty of sun during the day by the way, thank you