The chlorine won't hurt them from a chemical standpoint but long exposure will remove the oils from their feathers. So a little chlorine won't hurt but daily would leave them a little bedraggled.
Sounds like your taking good care of them. I personally would take them away before long. That's a lie, they are too cute. But the poo in your pool :sick . I have a friend who had this happen and the duck comes back every year. This is her 4th year to raise ducklings in the pool. As soon...