Can you tell if your system is good or bad from looking at the skimmer

[Myka]

That happened on my reef when I first put the SWC on it. I had a small SWC on it for a few months as an emergency skimmer before I got around to ordering the bigger one. The new, bigger SWC pulled gunk out of the tank big time. I had to empty the cup everyday or it would overflow. Now I clean it every 2-3 days because if the neck gets dirty it impedes the ability of the skimmer. I only get about 1/2" in the cup in 2-3 days now.