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Originally Posted by rrkss
Where would I find a solenoid since I would love to automate turning on and off the gas. Right now I have a manual ball valve to shut the CO2 off at night and on in the morning. I'll start with 1 bubble per second and see what that does. On the weekend I'll crank up the CO2 and watch the fish.
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Here is where I bought one:
http://www.rexgrigg.com/sale.html and it is a good one. (Scroll to the bottom of the page to see it. And, ignore the crude language!)