im doing something wrong? warning on calculator

[jonny8ball]

right iv got hardish water and entering in the calculator iv got this

my alkalinity is = 171
carbonate reduction method as = crs - residual alkalinty = 100 for a stout?


CALCIUM= 127
Mg= dont no this one
SODIUM= 11
CARBONATE= 102
SULPHATE= 27
CHLORIDE= 24



so the problem is im getting is

"warning: Your intial carbonate level seems too high. Check carbonate reduction parameters"

residual alkalinty = 100 ,,,,this is set to this because i want to leave around 100 to 150 p.p.m alkalinity for a stout am i right here

[jonny8ball]

think im going to for get about the warning and crack on