Erik, I would not advocate what you do either. However I have not tested for pH in years. I used an electronic meter and personally found it unecessary.

I dosed Kalk with the slurry method when I learned of it from Calfo's book. I measured my Ca levels and did not worry about my pH. I did start this with my old 100g, however, I believed the larger water volume allowed me to dose the slurry method w/o the worry of too large of a pH swing.

And the precipitate that forms on the top of the Kalk H2O exposed to air (I forget what the precipitate is) does not occur with the slurry method.