I don't trust the Apex ph monitor system, so I use a Milwaukee, which has been rock steady for a few years. Having said that, I basically use the same steup as you, and it truly is a one-knob solution to controlling the alk/cal/mag/etc. I have my CO2 regulator set slightly higher than what it needs, the ph pegged at 6.6, and just use the Kamoera to control the alk. If I want more alk, I increase the flow. If I want less alk, I reduce the flow. The Milwaukee ph controller and electric solenoid take care of the rest.