Hi Junebug, Well, you would not believe it, but my son in law came over a couple of weeks ago and he strung silver streamers on my tree next to the pool, as well as on the table umbrella -- we placed them all around the umbrella and around the patio cover, as well as on those small wrought iron flag poles you stick in the ground.(I have a"hill" behind the pool and stuck a couple of them in the ground with streamers hanging on them; and we then placed a helium filled silver balloon onto a tube we inflated and have it floating in the pool. The sun reflects off the silver streamers and balloon, and so far (fingers crossed) they have not returned. So i'm hoping that this will work. Of course the pool now looks like a disco room, and we have to be sure to wear our dark sunglasses so that the glare from the sun on the silver streamers doesn't burn our corneas! but the ducks (hopefully) are gone!! Thank you so much for your answers....