DESCRIZIONE
The invention relates to a pond pump (1) for producing a water flow that flows through the pond pump (1), comprising an inlet opening (7) for water to be sucked in and a filter arranged in front of the inlet opening (7) in the flow direction, wherein the filter bounds a filter chamber (9), which is at least partially surrounded by a filter surface permeable to water, in such a way that there is unfiltered raw water outside of the filter surface and filtered clean water inside the filter chamber (9). According to the invention a swirl element (12) is movably supported and rotationally driven in such a way that swirls are produced on the outer, raw side of the filter surface (10) facing the raw water, which swirls impede or prevent the accumulation of solids on the raw side of the filter surface (10).