Eheim harbors for quality - also in this case. I have already tried some aquarium aerator and none was as quiet and unobtrusive as this. A small point deduction is available for the control of the air force, with the two controllers on the pump you can not really adjust the airflow. A difference may not be noticeable between max and min. I have resorted to controllable pinch valves because I was too strong airflow. The supplied hose is too short for 2 outlets, you have to buy tube to. Nevertheless, the quality makes up for these small shortcomings.
