I am probably totally in the wrong, but I very quietly tell my ducks, "OK, the pool is closed...", and clap my hands twice. They calmly and efficiently form an orderly line and march up the ramp and out of the pool then down to the ground all single file with no pushing or shoving. I am very proud of them.
And if 1 or 2 stay behind, I beat the surface of the water like a mad man with the pool skimmer so they fly out of the pool the fastest way possible (forget about the ramp!!!!). This almost never happens........ any more.