Hofer Gurgle Buster

[phar]

Hi all,
I've moved my tank upstairs into my living room. I have a 90 gallon drilled with one drain and one return. The problem is it gurgles like crazy and may drive me mental.
I was doing some research and found this:
http://home.everestkc.net/jrobertson...struction.html

Has anyone tried this? Does it work? Any suggestions on trying to make the drain as nearly silent as possible. The water gurgles going in and coming out. I've got a reverse durso drain on the bottom but it doesn't work very well for reducing noise. Any other suggestions?
Thanks,
Patrick