I know this probably been ask a million times already. But donít really have the time to search for the answer. I have been searching all over the web and been learning but I hoping all your experience out there be able to help me even more. I am trying to find and figure out which co2 valve/gauge assembly set-up, or system to go with. I am going to use a 5# or 10# bottle. US threads. It will be going to a 75G tank. Planning on just using a timer to turn it off at night. Then I am hoping to be less than a $100 for gauges, electrical valve (on and off), needle valve and like to have a one way valve between the bubble counter and electric valve. Keep any fluids from bubble counter from going to valve. Or if it is a whole system I am hoping around $160?