I finally threw the leaking reactor that we made as a club in the garbage and built a new one. I am using the same CO2 equipment that a bunch of us ordered. However, I am having a very hard time getting the bubble count to stay steady. It was doing this on the old reactor as well. I have the regulator set at 5psi. However, over the span of 15 minutes, the bubbles will slow and stop. I am assuming this is the needle valve. This is the regulator, needle valve, solenoid, bubble counter all in one deal. I guess if I have to, I can build a quick bubble counter and change out the needle valve. Anyone have any other ideas or suggestions?