Sorry... but just curious...
I have never used anything like a CO2 regulator... so really not sure the purpose of adding one.
And my ph is always fine.
SO I guess, the question I am wondering, is there something else in your tank that is directly related to the CO2 regulator and due to malfunction drops your ph?
I keep a simple reef, so I never have these technical headaches I see others having.
Good luck.
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