Meanwhile, the pump was already quite weak, since I did not know how she was clean. Now I have seen for a replacement pump and discovered in the photos the cleaning instructions. The part goes so apart! I did not know so far.
Now the first pump pumps not more like the first day, but still very good. Probably the performance has declined since it was not cleaned inside for 1 year because I just did not know that you can open it.
In the next order is in any case of this filter with there recently. The time there were not yet well.
Glad that the fountain is always evolving and that these "upgrades" are also attached to the old first wells.