We use a freindly neighbor to change ours, let them out in the am and put them back in at night with fresh food and water again. They don't mind doing it for us and we only ask when we really need someone. Plus we give them free eggs! This helps!! We are stuck unless we can get a duck babysitter!
Other wise there is no way to keep the water clean, now you could keep them from pooping in it by raising it so they can't get in but can drink and like someone suggested having a deep water container so the don't run out in the two days. I haven't done any of these things yet but I have pondered over it quite a lot as well as looked into the auto waterers. I got some of those nipples at the co-op but now I read somehwere that when ducks use them it wears their bills down!? Now I don't want to use them.
Other wise there is no way to keep the water clean, now you could keep them from pooping in it by raising it so they can't get in but can drink and like someone suggested having a deep water container so the don't run out in the two days. I haven't done any of these things yet but I have pondered over it quite a lot as well as looked into the auto waterers. I got some of those nipples at the co-op but now I read somehwere that when ducks use them it wears their bills down!? Now I don't want to use them.