Filter good but connections in the original unfortunately leaky and unusable
The filter works well and can be installed securely and in a space-saving manner behind the pump and the pressure compensation tank once you have connected it tightly (see below).
The tank itself is also high quality and appears to be stable, and the filter works without any problems after the modification below.
Unfortunately, the plastic thread of the white connection nozzles is made of the cheapest plastic, i.e. it either leaks because you don't tighten it enough on the first careful attempt (there are no sealing rings included), or it leaks after the second tighter attempt because the nozzle is damaged at the transition between the thread and the nozzle (1x hairline crack with water leaking out, 1x complete tear which blew off the hose when the pump was switched on).
We then replaced the plastic nozzles with brass nozzles, which we screwed into the plastic of the housing with a bit of brute force (and which the local marina shop fortunately had in stock). We were able to use the filter this way and it has been doing a good job ever since. Without this little "McGyver move" it would have been completely useless and rubbish. It's a shame that the manufacturer saved a few cents in the wrong place and ruined the whole product.