So, Here's to asking the Million Dollar Question..... How does one balance the entire setup to eliminate the slurping sound the Weir box Makes... In recap, 120 Gallon tank, the Sump is modeled after a Model F from marc's designs out of a 29 gallon aquarium (overflow splits to 2 sections, 1st being where the skimmer will sit and the 3rd section where the fuge is.) BTW, the Ball valve is located above the fuge....I could leave this one open and cut in a new Ball valve right over ...