I have an AquaMedic Regulator with solenoid and a needle value. when the solenoid is shut off, the CO2 is closed fully without problem. but the new morning when solenoid is on, there is no CO2 bubbles going through my bubble counter and I have to manually open needle value large to see the bubbles and then turn it back to small. I have to do it every morning. Really a headache.. do you guys have any clue what is wrong with the needle value and how to fix it? Thanks for any advise.