Hey! We used to have that same black tub for our ducks! But they outgrew it so now I have them in one of those livestock water troughs! Here are some actions shots (videos are better, but it doesn't look like I can upload them):
Cool! I like your water trough! It looks big.. Soon we will have to get a bigger tub, we have 2 more females (Ducklings) coming so we need one of the water troughs, Your ducks are so big!