When can I get these kids out of my jacuzzi tub?
That's an excellent question! Speaking from experience, it would be best to wait for them to be about 3 months old. I've mixed ducklings with adults before and the adults got excited and accidentally drowned the ducklings. This was in a pond. Your situation may be different but I have observed the ducks and geese getting a bit rowdy. If they don't drown, injury is the next thing to worry about!