The calcium floor, ppm, that a new water rule starts with.
PALMER_KAMINSKI_WATER_2013 gives 50–150 ppm as the working range for
brewing calcium, and this is the low end. It's enough for mash pH,
flocculation and clarity without using up salt on an ion the brewer didn't
ask about. It's set above the 40 ppm in ION_ADVISORY_RANGE_PPM
because 40 is where a shortage starts to cause problems, and a default
shouldn't start right at that edge.
The calcium floor, ppm, that a new water rule starts with.
PALMER_KAMINSKI_WATER_2013 gives 50–150 ppm as the working range for brewing calcium, and this is the low end. It's enough for mash pH, flocculation and clarity without using up salt on an ion the brewer didn't ask about. It's set above the 40 ppm in ION_ADVISORY_RANGE_PPM because 40 is where a shortage starts to cause problems, and a default shouldn't start right at that edge.