yes, take the hose and sink it in the pond. do it carefully so that there is no air left in the hose. Then you need to plug the end of it so the water will not run out while quickly getting the end of the hose below the water level.

It helps to have a hose that is just long enough. Too long makes it more difficult to sink. Alsowhen youre done, put the end of the hose in a bucket in the pond, it will keep it off the bottom and in the muck.