I've heard of people doing it. I've also read that if any problems result, it's usually the painteds that have them.
My RES and painteds are kept separately, partly because my RES is older and quite a bit larger than my painteds. I also don't have a tank/stock tank that would comfortably accommodate all of them. And I've found them to have very different temperments which I don't think would result in harmonious living if they were all together.


