Really? People don't want duck in there ponds? They have such tasty eggs, seal your pond, suppress weeds like duck weed ( go figure, its an very healthy forage for them and they control it) and dependin on the species you choose, can be very tasty. Some duck meat is just not good. I don't care for a greasy Peking duck. All in all its a total win. I'm not sure why you would discourage water fowl from your pond