Question on co2

I hooked up calcium reactor last week. On ph controller I put 8.2 for center value. Today, it finally got up to center value and automatically turn outlet 1 (co2) and now I wanted to adjust bubble per minute but when I adjust needle valve, nothing bubbles is coming out. I did everything to follow what Im suppose to do. My question is why there isn't any bubbles. What am I missing?

 

After I reread the instructions and I realized that not only "outlet 1" light means it's on. It just turns on at point when "hi" light on which will appear bubbles. /DesktopModules/ActiveForums/themes/_default//emoticons/smile.gif