Just saw this items and thought what a great idea. Don't think that the filter will be too useful with ducks, but it prevents the pump from sucking it all in. Take a look at the video, they even have clips that hide the cord. Very interesting. I may order one for the winter for the ducks.
http://www.khmfg.com/farmandranch/stock-tank-de-icers-filters/clean-flow-filter.html
That and their heated water hose.
http://www.khmfg.com/farmandranch/heated-hoses-hose-heaters
http://www.khmfg.com/farmandranch/stock-tank-de-icers-filters/clean-flow-filter.html
That and their heated water hose.
http://www.khmfg.com/farmandranch/heated-hoses-hose-heaters