Aquarium Co-op CO2 regulator manifold issue

[FSU4theWin]

All of a sudden my CO2 manifold that came with the reg lets a ton of Co2 thru even when I turn it all the way down. The expansion manifold that sits between it and the tank still works fine. I have taken it apart and reassembled it and did not see anything obviously wrong with it. Any ideas about what I could try?

[FSU4theWin]

It's the knob on the bottom of one of the bubble counters that doesn't slow the flow. The secondary pressure gauge works fine. With pressure equal one of the bubble counters can not be tuned and let's too much CO2 thru while the other works correctly.

[Sarina]

Please email us at shipping@aquariumcoop.com and if you can, include a short video of the problem you're experiencing. If this isn't something we can troubleshoot, we will go ahead an start the warranty process.