Originally Posted by Pleco1415
I have noticed the aquaclear is more quiet without the lid does anyone one else notice that?
Yes. I have to leave the lid off ..... some people tape it down ...... which you may want to do when guests come over
I have the same problem with my FluvalC3.
As for the impeller, my aquaclear50 came out of the box silent. On the other hand, my FluvalC3 made a horrible rattling noise for the first three weeks but it went away by itself and is now completely silent.
I would think these top of the line filters - both made by Hagen - would not suffer from such ridiculous flaws.
Here is my thread when I had the problem:
Two days of FluvalC3 are enough .. Best quiet filter?
The advice I got was correct. It will go away .... just be patient !!!!!!!