Need Water adjustment help for Dark Stout

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Adam78K

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So Far came up with this recipe for Russian Imperial Stout and been using the Ez water calculator to adjust my ideal water for Seattle, Wa soft water. My Water report right now is

Calcium-8.9 ppm
Magnesium- 1 ppm
Sodium- 6.8 ppm
Chloride- 4 ppm
Sulfate- 2 ppm
Alkalinity- 17.5 ppm

I know you want chloride and Sulfate to be even for a balanced beer, and I need to raise my Alkalinity higher for my Stout. Help is needed here, thanks everyone.


BeerSmith Recipe Printout - http://www.beersmith.com
Recipe: Russian Imperial Stout
Brewer: Adam Korby
Asst Brewer:
Style: Imperial Stout
TYPE: All Grain
Taste: (35.0)

Recipe Specifications
--------------------------
Batch Size: 5.50 gal
Boil Size: 6.62 gal
Estimated OG: 1.101 SG
Estimated Color: 55.3 SRM
Estimated IBU: 51.3 IBU
Brewhouse Efficiency: 70.00 %
Boil Time: 90 Minutes

Ingredients:
------------
Amount Item Type % or IBU
19.00 lb Pale Malt (2 Row) UK (3.0 SRM) Grain 82.61 %
1.50 lb Roasted Barley (300.0 SRM) Grain 6.52 %
1.00 lb Chocolate Malt (350.0 SRM) Grain 4.35 %
1.00 lb Special B Malt (180.0 SRM) Grain 4.35 %
0.50 lb Caramunich Malt (56.0 SRM) Grain 2.17 %
1.30 oz Magnum [14.00 %] (60 min) Hops 42.0 IBU
2.00 oz Goldings, East Kent [5.00 %] (10 min) Hops 8.4 IBU
2.00 oz Goldings, East Kent [5.00 %] (1 min) Hops 1.0 IBU
1 Pkgs US-05 (DCL Yeast #US-05) Yeast-Ale


Mash Schedule: Single Infusion, Medium Body, Batch Sparge
Total Grain Weight: 23.00 lb
----------------------------
Single Infusion, Medium Body, Batch Sparge
Step Time Name Description Step Temp
90 min Strike Add 24.00 qt of water at 170.7 F 156.0 F
10 min Mash Out Add 14.00 qt of water and heat to 19190.0 F
 
Just did a quick calculation on my ez tool calculator, let me know if this is ok? Can send a email of the calculator calculations of RA of 261 and mash ph is 4.91. Still feel like the RA is to low for a SRM of 55.5 but I cant raise anymore without getting to much Calcium and Sodium.
 
I get a SRM of 37.2 with my calculations. I have soft water in Atlanta as well: with stouts I tend to use larger portions of calcite and some gypsum.
 
how did you get 37.2? And still little confused why I need gypsum because doesn't that lower mash ph and RA?
 
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