I totally agree with Ashleymarie. All of my ducks were put into the garage sink (by me) when they were 2-3 days old. I made the water temp about room temperature or just above--70-80 degrees F. It was well deep enough for them to swim, and just a bit deeper than the tips of their extended feet. It was easy to see that swimming was enjoyable to them, right from the start. And the little black Cayuga was a true diver! He would swim underwater for the length of the sink. Very new ducklings swimming and clowning in the water is a true joy of life!
Gil
Gil