Greetings from Helsinki. This is my first post.
My problem here is distilled water is not readily available for reasonable price, and RO equipment is out of question.
I just received data about bottled spring water, sold near me in 5 liter bottles, stating:
Total hardness 22 ppm
Alkalinity 18 ppm
Now I’d love to ask you knowledgeable members how to adjust this to optimum coffee brewing water.