Here it is:
Works great, baking soda in one bottle, citric acid in the other, connected to a solenoid and then into the tank.
I wanted a DIY CO2
system that can be used with a solenoid. When the solenoid is closed at night, the pressure builds in the bottle until 3.6kg/cm2, then a safety valve slowly opens (it's like a spring) and brings the pressure back down to 3.2kg/cm2. Rinse and repeat.
Basically a nice solution to having a diy co2
system that can only run during the day, without worrying about pressure in the bottles increasing too much when it turns off at night. Only slight pet peeve is a bottle can handle probably 7 or 8kg/cm2, but that safety valve wont let it get near that.