The pond filter TIP 10000 with UV-C is in our pond (about 5 m³ water volume) for three weeks without a break in service. The assembly was. unlike some other opinions, without problems and quickly done. Before the filter was used, the heavily interspersed with algae water was changed because we had a concern that would be unable to cope with the polluted water of the filter. Nevertheless, in the freshwater residual pollution and algae shares was still present. The filter has easily filtered out the remaining algae and Schwebanteile in recent weeks. We are very satisfied with the product &. Can absolutely recommend the filter. In the following period we will test with a timer, if it is sufficient to use the filter in the part-time operation.