Emeegency help for calcium reactor

[Saieditc]

Hi dears
I set up reef octopus calcium reactor
But i dont see bubble ci2 .i think some connection is wrong
Help me thanks

 

[KrisReef]

I don't see a CO2 tank and regulator to make bubbles if the tank has gas and if the pH monitor is working to activate the regulator. If the pH is already low in the reactor no bubbles should be coming out either.