Ok I am running this skimmer
http://www.wonbrothers.com/product/skimmer/clean200.htm
I purchased it from Aquagiant and it seemed to function fine on my old tank the only problem being that I had it in a section of my sump that the water level fluctuated due to evaporation so its skimming was on and off due to the fluctuations in level.
I now have it in my new sump with a nice fixed level and it doesn't skim at all, there are plenty of bubbles and a good head of foam but nothing seems to even be scuming up the sides of the skimmer.
My bio load is way down (a couple of clowns and an algae blenny) is it possible that I just don't have enough crap in the water to skim out?