Hey there carlos!
I was following along this thread and i am in the same boat as the previous guy. Here is my setup. Hydros x10 with IV for testing alk and ph and salinity. I have and XP8 and wave engine V2. I have a seperate kamoer x1 pro dosing all for reef. i am making the switch over to the kalk method from a vat dosing evaporation at night for about 12 hrs based on PH. My question is, Do i need to have a seperate PH Probe in the tank monitoring the 24/7 or am i able to use the one from the IV some how. If i cant use the IV then i guess i need to buy another hydros with a PH probe and use the last dosing pump on the X10 to dose my kalk. Let me know if you have a solution for me, thank you in advance.
ps i will take a look at the How to ADD kalk tutorial to get familiar