Skimmer efficiency?

Does anyone know enough about skimmers to tell me how to make sure it's doing it's job well? I have an ASM designed to skim a 300G tank. I always hear people talking about the 7 ounces of coffee dark skimmate their skimmers extract every day. Mine is more darkish green and takes about 2 weeks before I have to empty the collection chamber. I know I'm overfeeding right now and would expect the skimmer to be going much stronger than it is. Do I have a lemon skimmer, or am I doing something wrong? Thanks again!

Very good question!!! I can't wait for someone to answer it. I have an asm g-1 that I think is working well but I don't get alot of skim either but it is very dark green.

Bobn4burton,

My skimmer sits in my 40G sump. I'm assuming it is a G2 also, but I'm not sure. It stands about 2 feet tall and is about 9" in diameter if I had to guess. It does have a venturi. When it comes to anything technical, electrical, mechanical - I'm at a bit of a loss. Calfo highly recommends the ASM and says it works great. I just don't tend to get the "sludge" out of my water that others report. The skimmer generates millions of microbubbles, which float to the top, turn into foam, and spill over into the collection cup. When I get home, I'll try to find and post some specs. I've consisered running mine wet too, but worry about salinity and overfill issues.