I found out the hard way that koi will die in a duck pond. It actually used to be a koi pond until I got the ducks, I was very attached to my fish... We found a large red ear slider on the highway today, I believe he was a pet who was dumped. It happens a lot with turtles, people don't want them when they get bigger, just like chicks and ducks. But my question is, will the water be toxic to the turtle? Will they bother each other?