KalkWasser KHD: thanks! :-)

Wanted to thanks GHL team for the nice job!
I asked Matthias to having the Kalkwasser mode because I'm using Kalkwasser for adding Calcium and Kh to my tank.
So it's like Calcium reactor except that the sign of ajustement is the reverse of the Calcium Reactor:
For Calcium reactor, when Kh is too high, to reduce Kh production, the Ph nominal value should be increased.
For Kalkwasser, the Ph target need to be decreased.
for now, I need to go slowly to find right setings! :-)
If you are interested to some more detailed explanation about this method, please ask.
Thanks GHL team!
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