Can't wait to see the photos, it sounds beautiful.I know that ducks are very messy, I can change the water of the birds.
I have a lot of time before taking the eggs and having the babies and I can think that with tranquility.
Ducks are not going to have a big water container, will be small and only for drink, they have a abandoned pool in the monastery that I'll take them there for a swim.
Tomorrow i'll calculate the m2 that have all the pens and know how many birds can take, the number of eggs it's not the same as the birds. And I give you photos of all the monastery to show you the acces where they could be many hours every day.
Thanks
Ducks need water deep enough at all times to keep their nostrels clean and it also helps them eat as they are not like chickens or peas they have trouble swalloing dry foods and need water to aid in that also, that is one reason they are so messy and things get to smelling real fast.