The sand filter is not very easy to assemble. To get the system against leaking water tight were necessary several Anäufe. After a change of the sand filter, the tightness between sand container and lid was no longer possible. The system constantly dripping. In the handling / operation and filtering performance, there were no problems. Better an investment is no timer, since they can be provided with flexible an external timer. In this installation, the pump must be switched on manually and switches off automatically only.
