What happens if you turn the air adjustment valve all the off? Does it still foam up and fill the cup. If it does that would indicate to me that there is a leak somewhere in the air line going to the skimmer. If the foaming stops when you shut the valve all the way down, go ahead and shut it down, and wait for it to stop, then just barely break the adjustment valve loose, BARELY. Wait a few minutes, if you're not getting the proper aggitation, then move it a frog hair more. Repeat until desired effect reached.
GL |