Graham's Water Treatment Calculator vs Brupaks Guide

(That's water to the rest of us!) Beer is about 95% water, so if you want to discuss water treatment, filtering etc this is the place to do it!
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Dave S
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Graham's Water Treatment Calculator vs Brupaks Guide

Post by Dave S » Tue Oct 09, 2012 1:36 pm

Hi Guys

When comparing these two methods for my own water supply, the recommended addition of salts for a bitter from GW's is around 10 or 11 grams of gypsum and very little of anything else. If I use Brupaks DLS calculation, the total is something like 21 grams.

Anyone got any thoughts on the apparent disparity?
Best wishes

Dave

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Aleman
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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by Aleman » Tue Oct 09, 2012 1:38 pm

Different authors have different concepts regarding water treatment.

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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by vacant » Tue Oct 09, 2012 2:10 pm

Aleman wrote:Different authors have different concepts regarding water treatment.
OP is not comparing like with like (gypsum vs dls which is gypsum/calcium chloride plus ?). Murphy's product data sheets say gypsum adds Calcium:Sulphate @ 20:48, whereas DLS adds Calcium:Chloride:Sulphate @ 31:31:64.
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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by Dave S » Tue Oct 09, 2012 3:35 pm

vacant wrote:
Aleman wrote:Different authors have different concepts regarding water treatment.
OP is not comparing like with like (gypsum vs dls which is gypsum/calcium chloride plus ?). Murphy's product data sheets say gypsum adds Calcium:Sulphate @ 20:48, whereas DLS adds Calcium:Chloride:Sulphate @ 31:31:64.
Those Calcium:Sulphate ratios aren't a million miles from each other, but if the figures are correct, the recommended quantity of DLS of around 21 grams adds massive amounts more than GW's recommended addition of around 10 grams gypsum.
Best wishes

Dave

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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by Dave S » Wed Oct 10, 2012 1:27 pm

Dave S wrote:
vacant wrote:
Aleman wrote:Different authors have different concepts regarding water treatment.
OP is not comparing like with like (gypsum vs dls which is gypsum/calcium chloride plus ?). Murphy's product data sheets say gypsum adds Calcium:Sulphate @ 20:48, whereas DLS adds Calcium:Chloride:Sulphate @ 31:31:64.
Those Calcium:Sulphate ratios aren't a million miles from each other, but if the figures are correct, the recommended quantity of DLS of around 21 grams adds massive amounts more than GW's recommended addition of around 10 grams gypsum.
I still can't get my round this. Maybe Graham would care to comment.
Best wishes

Dave

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Jim
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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by Jim » Wed Oct 10, 2012 4:16 pm

Dave S wrote:.........I still can't get my round this. Maybe Graham would care to comment.
Hopefully he will, but it's worth remembering that the recommended amounts of salts for particular styles of beer are matters of opinion anyway, and usually a range to aim for is given rather than any kind of exact calculated figure.
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Dave S
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Re: Graham's Water Treatment Calculator vs Brupaks Guide

Post by Dave S » Wed Oct 10, 2012 4:23 pm

Jim wrote:
Dave S wrote:.........I still can't get my round this. Maybe Graham would care to comment.
Hopefully he will, but it's worth remembering that the recommended amounts of salts for particular styles of beer are matters of opinion anyway, and usually a range to aim for is given rather than any kind of exact calculated figure.
Yes, I see that Jim. It's just that there seems to be such a difference in quantities. But as I think you're saying, using either might be OK.
Best wishes

Dave

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