Help with water adjustments for a dry stout

[mgillard1976]

The calcium requirements for a dry stout tend to have a high calcium requirement as I understand it. My water starts low with calcium and I end up driving sulfate and chloride too high if I try and use gypsum and calcium chloride. I can try and use chalk but then my pH goes too high.

My starting concentrations are below:
Calcium 12
Magnesium 0.3
Sodium 34
Bicarbonate 69.7
Sulfate 16
Chloride 32

Any suggestions?

 

[Silver_Is_Money]

Chalk is useless. It will not dissolve in water unless CO2 is bubbled through it.

 

[Silver_Is_Money]

For every 5 gallons of water:

4.50 grams gypsum
1.75 grams calcium chloride dihydrate (or 1.33 grams if anhydrous)

 

[mgillard1976]

For every 5 gallons of water:

4.50 grams gypsum
1.75 grams calcium chloride dihydrate (or 1.33 grams if anhydrous)

This gets my calcium in the ballpark but my sulfate and chloride go outside the mark by a factor of three or more.

I guess there is just only so much you can do!