Well I gotta say I have dissolved chalk two times using the CO2 method you describe
Kai, and then used it in the brew water. The water came from a machine that claims
to DI,UV, & RO treat the water. I asked the attendant and he gave me a little tour of
the inside of the machine. Seems real enough, and if so then the mineral content should
be mostly gone from this water allowing me to add back salts and minerals to custom
taylor brewing water.
The 1st time the beer was very tasty. Second one is still lagering and will
be due to sample in May....prolly cinco de mayo and it is of course a Maibock.
If I can hold myself back that long.