hi,
I have a sound problem of harmful effect with my aquastream. Indeed, it makes an unpleasant noise of “buzz”. I carried out a support “sandwich” to eliminate the vibrations and Ca does not come from there. I also modified the propeller and there is no more “play”. I can also specify that I do not think of having bubbles of air “to have shaken” the PC well and to leave the pump in deaeration mode during more than one hour. For information, on Aquasuite, the pump is with 8w and I wonder whether it is not too high knowing that I could read on various handbooks which the normal power is towards 4,5 w.Qu' think about it you? thank you

I did not understand well, that must I replace: the pump (aquastream) ?

Quoted from "mario_cell"

call the support of AC and they will help u

Like nitrix said, u probably got a bad pump

Thank's for your answare
I noticed that the noise in question was very attenuated lorque I increase the frequency of the pump. In fact, it makes this noise only when I regulate the frequency by defect