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Sounds complicated lolYou can monitor and or dose with the KH Director. I have 3 of them, I calibrate the PH probe every 6 months, all my tanks are steady at 7.5KH. One is controlled by a calcium reactor and is connected to a P4. I have a stand alone unit for my frag tank which is also monitor and dosing and has a second slave doser connected to it which is dosing aquaforest 3 part.