Skimmer making clear bubbles!

[irishstout]

My skimmer is only producing clear bubbles. Shouldnt they me a nasty brown/black? What could be the problem? Light load in the tank? Any responses appreciated.

 

[david s]

what kind of skimmer if the bubles are in the chamber of the skimmer and not in the tank they are ok and as far as color bubles they should be clear the junk should be in colection cup <img src="graemlins//eek.gif" border="0" alt="[eek]" />