I have 4 Swedish ducks about 6 weeks old. They have access right now to three 'tub's and a one gallon chicken waterer..... I have 5 chickens as well, and I can't seem to get the ducks to leave the chicken's water alone... anyway.... I live in Central Florida and am attempting figure out the most cost effective yet big enough for my four ducks. I can't find any swimming pool at Walmart, kmart, etc... so what other ideas can one use?