If you like to be able to adjust absolutely everything on your skimmer, this is for you. It is a great skimmer that is almost silent, and can pull some serious air into the body. I ran it with the pump at about 3/4 speed with the air wide open. You can adjust it to whatever though. It is very well built, and in close to new condition. I ran it in 9" of water in my sump, and it was consistently at 9" so I'm not sure how fluctuated water levels would affect it. I thought I would like all the adjustments, but I like my Aquamaxx set it and forget it better. Asking $175 obo. It is a little over a year old. Beer is for size reference only.