A stock tank works well for muscovies. They are nice because most have a drain near the bottom you can hook up to a hose. I run the hose to my flower beds and drain the water that way. There is always some water left at the bottom, but the poly stock tanks are sturdy enough to tip over on their sides to dump it out. Kiddie pools tend to break when you tip them. I would love a pond or aquaponics set up. I hear the filter is problem with ducks. That duck poop, feathers and things the ducks drag in, overload it and clog it constantly. My brother is up in Oregon on 60 acres with a stream and big pond that is fed by three springs. That would be my dream set up! Southern Ca is so dry, I wonder what the water situation will be like in ten years or so.
I clip wings also. It would be nice if I didn't have too. I always feel bad for the ducklets that wake up one day and can suddenly fly! This is so much fun, how amazing! Only to be grounded the next by me. Bummer.