That'd be great but you need to buy a pump with it.
As far as heaters go, use whatever you like, just make sure it has a guard around it that allows for decent water flow. Like a piece of PVC pipe at least 1 inch larger than the diameter of the heater with lots and lots big holes drilled in it (like half inch holes spaced 1/4" or less apart.)
You could get one with a controller and a titanium element, but you'll still need a way to guard it because your turtles could burn themselves bad on one of those.