I had bought the pump on a friend's recommendation and because of the good reviews. I'm actually confessed at air pumps EHEIM fan as well as at EHEIM always something is broken, I wanted to try something new. Also have the smaller air pumps Tetra and SERA, but all are considering EHEIM quite noisy. The Schego optimally has a very high pumping capacity and the optics I find very appealing. Unfortunately, the power cord is quite short and at least my Schego pump very noisy! It is a powerful roar, had they operated standing and hanging, it was unfortunately only with strong throttling better, but I can set a smaller pump me, too bad! Will they return tomorrow, have GE rade my old 200 EHEIM pump reconnected to the Aquarium and it is again nice and quiet!