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Actually... It does.
I had programmed it for monitoring pH for when I was going to use a Ca reactor. In the event pH dropped too low, it was going to cut off the CO2.
Not sure how to program around the fact that I have the Kalk mixed directly into the top-off tank. If I was dosing it from a separate container, then I would just use the existing code, but invert it to monitor for high pH and shut off the doser.
I'm in the process of redoing the controller. The one I have 'works' but it's not very customizable. The new one will be. For the new one I plan on doing a separate Kalk container and have a small pump push the top off water through the Kalk. In the event the pH of the tank raises too high, then I'll just use plain RO/DI for the next top-off.
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