First off, I just want to say a big thanks to LondonDra0gon and Dan. These two guys have been helping me out so much with answering questions and giving advice in getting my Tank and FE CO2 system setup. So much so that Dan even gave me his mobile just incase I had an issue with the CO2 FE and needed some emergency help. You have to understand that I had no knowledge of CO2 systems, not even tried a DIY CO2 kit, but took the plunge after reading Dan's great FE tutorial and on LD's advice. Man, was I bricking it when I fired the FE first time, followed by a pleasant 'that was easy and not as bad as I expected'. Anyways, spent all day yesterday playing around with adjusting the needle valve settings, making slight adjustments every 30 mins or so, opening up the valve to allow a little more co2 than previously. the first few attempts, I had co2 coming out but after 30 mins Id check to see that there was no activity in the Bubble counter and it seemed to have stopped. So i would open the needle valve a little more, and then it would start up again. Finally thought Id found the sweet spot yesteday and hooked up the solenoid to a plug timer. Today however, solenoid clicks into life, and after 30 mins to 45 mins still not getting any activity in the bubble counter let alone the diffuser in the tank. Just wanted to check with you guys first, is this all still down to the needle valve? Do I still need to make finer adjustments? Is it simply not releasing enough CO2 hence why it was working yesterday and not today?