Well, if it's the SWC, you can't get it "fixed", 'cause that's the way it operates. In the process of making Cl, you get some hydrogen too...that's generally what's in the bubbles. I'm a silly boy because I've held a lighter to the bubbles to hear 'em go *PLOOP*. I just love a science experiment.

However, if you haven't had this problem before, then it's probably not your SWC, I'd guess you're sucking air through a jandy valve.

Michael