Yes, they are a horrible skimmer. You can try a piece of foam in the outlet of the skimmer to catch the bubbles. When I used mine a few years ago I used a limewood airstone and airpump instead of the venturi on the pump to produce the bubbles, which worked much better and reduced the amount of bubbles making it to the DT.
Skimmate is usually darker than that but with the skilter that probably the best your going to do.