I got trough all your posts in this thread. This is the 3 graphs you have posted.
I start with number 3 of the 12 jun. It shown a sudden speak around 12:99 where the pH rise from around 8,14 to 8.2. I suppose its after a bolus dose of your alk solution. For me - its the expected rise after a massive NaHCO3 (or mix) dose.
However in graph 1 that shows pH between 8 and 14/6 - I cant see the responding rise the 12:th. Why?
Graph 2 shows your KH 11/7 - not the 12/7 Why?
Is this because of bad software for the graphs or something else?
Sincerely Lasse