I have a very small pond that I have had to bail out the water every Spring bucket by bucket (oh, my aching back!!). Using a shop vac, the container fills up too fast with the pond water & I have go back to shut it off back at the unit, empty it & start over again. I needed something that would suck up the bottom sludge/water & dump it on to the lawn or into big tub (to dump on the flower beds later) but with an on-off switch located conveniently on the handle near where I'm holding it. Has anyone used the 'Muck-Vac' brand of pump that uses suction from a garden hose & pumps the sludge/water up onto the lawn? Easy to use without sucking up the fish!?