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@branbray07 I am really sorry for hijacking this thread as it relates to pH but this is Kalkwasser adjacent info.
@legalizedreefer I am referring to using this $10 solenoid coming off of a T close to the skimmer intake. The resistance of airflow through this 1/2" valve has got to be less than that of the CO2 scrubber. A friend of mine gave me a Neptune DC24V to bare wire connector that I will solder on to the solenoid.
FYI, this valve will require a minimum of 0.02mPa or ~3 PSI to operate. I have no idea what the draw is on a skimmer, or how this may impact its performance.