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minerals in mash water


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You might want to pick up a copy of John Palmer's Water: A Comprehensive Guide for Brewers, but keep in mind a good portion of what a brewer would be concerned with, a distiller would not be.

In general, you want hard water with low iron, with little or no chlorine or chloramine (generally this impacts surface water and not wells), and low volatile organics (generally this impacts wells vs surface water).

 

 

 

 

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You need some minerals in your mash water. mainly calcium.

Minerals will not make it into your final product unless you distill to such a high heat that you distill iron, calcium, copper, magnesium.  If you distill those minerals you are doing it wrong.

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You should get a water report or already have one (presumably a part of your health certificate) - which, will provide a profile of what you have. That way you know where to start when making modification decisions.

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Both. Unfortunately for me I'm dealing with arsenic, so to get the health stuff cleared, I had to agree to the RO throughout the process. But the CBW RO system I have allows for some slight adjustment to help dial in the profile you want.  

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Here in BC - you have to get a water license to be able to use private well water for commercial purposes. So they had a great deal of information about the rocks and stuff around our area. Between provincial Government and the local health department, I've been warned about the arsenic many times, so if you have a problem, you would probably already know :) The RO system completely cleans it up to everyone's satisfaction.

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What are people using to bump up their calcium?  People bumping up this number or fermenting as is?  Local water is 35 ppm calcium.  I run a sediment/carbon filter before mash cooker.  I have bumped up with calcium chloride and not and can't say I see any difference one way or the other.

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Mash Bill: 1400 pounds corn, 300 pound wheat, 200 pounds rye, 150 pounds malt; 800 gallons of water and 350 g of calcium chloride, 500ml sebHTL, 200ml sebFlo, 300ml sebGL.  At 35 ppm, it seems like the calcium in the grain would bump you up to around 80, which should be fine.  I guess I have been doing it because I would when home brewing to balance chlorides to sulfates.  In brewing, however, the boil would dissipate most of the chlorides (I think).  In distillation I suppose it might come over as a medicinal taste (though I haven't noticed this).  I don't think bumping up the calcium would be necessary (maybe even harmful), just checking with smarter people...

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