"Not sure if it was just my filter, but I had to remove the flow meter piece (it is supposed to be in the bottom of the filter underneath the spinner that causes the suction for the intake.) When this piece was in place it was vibrating and caused the filter to be REALLY loud.
I took it out and now LOVE this filter. I have it in a 29 gallon tank and it is working wonderfully and VERY quiet after my minor adjustment. Definitely worth the money. I can see this lasting for a long time and being very durable."