Skimmer Help!

[J Feez]

I think my skimmer may have stopped skimming! I have a Sea Clone 100 and it seems like it is not quite doing it's job anymore. This is going to be a crude explanation, but I'll do my best.

The reason I believe it's not completely doing it's job anymore is that it has become alot quieter all of a sudden, probably due to the fact that it seems like there is no more air being pumped into the actual skimmer. As in, there is no more white "froth" inside the tube. I know the pump is still working for the most part because there is still water movement through the skimmer.

Well I hope that made just a little bit of sense. Has anyone had a similiar problem?

Thanks,