At home, I use R/O water with a very light remineralizer (which isn't nearly enough), so I've been looking through resources for water recipes.

I came across this, which I think is very much worth sharing! Seems potassium bicarbonate is one of the favorites for taste.
https://espressoaf.com/guides/water.html

If anyone has equipment suggestions for mineralizing water please share! I'm looking for a more automated solution to replace manual mixing.