Hey bud, on your skimmer,,,,, I have purchased a Berlin clasic, I was jacking with it because they said they are hard to figure out, but I am not using it yet.
They said not to block the "outlet" lines, or give them any restrictions such as putting "exhaust" under water line, or making "exhaust" travel up from the "outlet". It looked as if your water was traveling uphill? I also noticed that bubbles never really enter the collection cup, I guess this is because all the "protein" will just be pushed up as more and more are skimmed? Finially, my skimmer would get big (gram size) air bubbles on the outer tube, is this mis adjustment, or just part of it?