Here is an update on my CO2 woes: I still cannot figure out how to make this thing work. I used dish soap and found a leak at the top of the bubble counter. I took off the top and screwed it back on and it seems to have fixed it. I still have the pressure at 30, there are bubbles coming out of the tube at about 1 per second (the bubble counter is currently set at 3 per second until I get this thing working). but still nothing will come out of a diffuser and I tried two different types. I am completely clueless.