One month I have operated and has nothing to report, apart from that you are forced to use the fountain if the water does not share in the deviation pipe (for me led to a cascade). Indeed if you remove the hose from the fountain water comes out too big a hole, which reduces the pressure to the deviation, so I put silicone in the evacuation for the water to leave the deviation .
Water in any case is always clean.
you also have the choice to power the pump or on an outlet, in this case you have to climb the provided plug on the cable, or directly connecting the cable to the electric meter.
lately the pump rose more water until the exit, I had to remove the foam that retains the residue that normally recirculates water: - /