For years I have problems with the water quality of my pond, ca.15.000l.Nun this pump and absolute Begeisterung.Quali and good value for top, life (I can not, of course, assess) but ... it brings a great amount at 60w dirty pond water with a Korngrössevon 8mm in the designated filter and can not, like so many before tried pumps, the dirt by sponge filter built-in Pumpengehäuse.Leise, vibration and so far well Fischverträglich.von me 5 stars.