It's the Aqueon overflow kit, so it is a durso, from what I've read.

http://www.paradisepetshop.net/image...owkit_6956.jpg

No pics of my tank yet, but that link is the product I've got. Does anyone else have this kit? I keep adjusting that tube, and just when I think I've got it, it flushes again. The water level inside the overflow box is going up and down by less than inch, then woooshh... water drops a bit, builds back up, and is quiet for another ten minutes to an hour. And it's not entirely quiet, just not as loud.

The drain line going into the sump is the flexible tubing that came with it, the ridged kind. I've got some heavy duty flex tubing from the pump into the return tube as well, the kind sold for pools.

The running water noise I don't mind, but the gurgling in the tube under the sump is just annoying.