I have the Prizm skimmer and it takes some "tweeking". I allow my bubble line to reach the o-ring area. The reason is, so I will have dry foam instead of wet. If it's wet the collection cup will fill in an hour or so. My valve is barely cracked open. Also, if it's hanging off the back of your tank you are probably getting bubbles, right? Well, I had that same problem too so stuck that SOB in the sump ....I could give a rat's @$$ about the bubbles now. And oh! Water changes, here we ago again with the Prizm skimmer!! You have to tweek the valve again because the syphon has been lost. It's a pain in the royal @$$, but hey, for $50 what do you expect??
Happy Reefing! <img src="graemlins//freak.gif" border="0" alt="[freak]" />