one guage for my Calcium Reactor. The part that turns off and on with the PH Controller. The one I have on seems not to stop the CO2 from coming out of the tank. so I want to replace it and see if thats the problem.
Check out pic. JBJ CO2 Solenoid Regulator. New in its original Box. Is this what you are looking for? Never had chance to hook up since been out of reefing for few yrs. Recently started Nano for shroom, zoo, etc w/ PC.
PM me if interested. Semibfy.