Yesterday arrived and immediately connected, I had the meantime a connected Eheim air pump 200, the difference is enormous. The pump replaces a Eheim 400 air pump, this was unfortunately broken, bought here April 2011. A magnet on the electric motor has broken out of its holder. The pump runs in my aquarium 24 hour, I filter means a HMF and agree to the result of the pump capacity more than satisfied. The pump runs very quietly.
