sump help needed for newbie....

[dunl]

Feel free to move this to the newbie section if needed...

Here's a picture of my current overflow elbow in the tank....notice the reflection point.....



Using a Mag12 in a 15 gallon sump. The noise in the overflow has been lessened by inserting some baffling, but the noise in the pipe leading to the sump is a constant draining noise.

Set up is such: water enters 3" overflow, goes through reducer and elbow and through glass, through 2" elbow and 2" vertical pipe, another 2" elbow and 2" horizontal pipe to bring it under the stand, another 2" elbow and 2" vertical pipe (slight slant) to bring it into the sump.

Looking at the HOfer and Stockman designs, but do they only reduce noise on the overflow, when it is the standpipe that seems to be noisiest?
Thanks,
Dunl