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Old 01-14-2007, 07:57 PM   #1
cweston's Avatar
Feb 2006
Manhattan, KS
Posts: 2,014
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AKA Chalk...

I'm brewing a stout tomorrow, and I want to Dublinize my water, which means adding a lot of calcium but not sulfate (which gypsum also adds).

I though I had some calcium carbonate, but I guess I don't. Any idea where one might find that, other than at a HBS. (The nearest HBS is an hour away.)

It's not a big deal: if I can't find any, I'll just do without.

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Old 01-14-2007, 08:52 PM   #2
david_42's Avatar
Oct 2005
Oak Grove, Oregon, USA
Posts: 25,599
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Calcium carbonate can be purchased at "health food" stores. Plain, unflavored calcium antacids might work, it depends on what was used for binding. It is also sold as lime in garden stores, but I have my doubts about the purity.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

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Old 01-15-2007, 04:38 PM   #3
Jul 2006
Posts: 20

Originally Posted by cweston
Any idea where one might find that?
You could try sodium bicarbonate (baking soda). There might be a slight taste difference but I doubt you'd notice in a stout. Don't use too much, and don't boil the water before you mash, or the carbonate will turn to carbon dioxide and disappear (CO2 and H2O from -CO3).


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Old 01-15-2007, 05:58 PM   #4
Adrian Abascal
Dec 2006
Posts: 55
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Yea don't use baking soda. hehehehe

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Old 01-15-2007, 06:49 PM   #5
Fiery Sword
Fiery Sword's Avatar
Oct 2006
Revere, MA, Massachusetts
Posts: 908
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GNC-type nutritional store if you are in an anti health food store area.

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