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Vermont Pub & Brewery's Water Witch

This document provides instructions for using a water treatment calculator called Water Witch to adjust brewing water to target mineral profiles for different beer styles. It displays the mineral content of a sample source water and target profile, then recommends adding specific amounts of calcium sulfate, calcium chloride, calcium carbonate, magnesium sulfate, and sodium chloride, as well as lactic acid, to adjust the source water profile to the target. The user is asked to confirm which mineral salts and acids they will use for the treatment.

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59 views3 pages

Vermont Pub & Brewery's Water Witch

This document provides instructions for using a water treatment calculator called Water Witch to adjust brewing water to target mineral profiles for different beer styles. It displays the mineral content of a sample source water and target profile, then recommends adding specific amounts of calcium sulfate, calcium chloride, calcium carbonate, magnesium sulfate, and sodium chloride, as well as lactic acid, to adjust the source water profile to the target. The user is asked to confirm which mineral salts and acids they will use for the treatment.

Uploaded by

Riyan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Vermont Pub & Brewery's Water Witch v101.

0
ttransforming water into brewing liquor since 1988
Enter the values from your water analysis in the corresponding cells in the SOURCE row.
Enter the mineral profile for a beer style in the corresponding cells in the TARGET row.
If you will not adjust one of the minerals, enter either "0" or the SOURCE amount in that TARGET cell.
Adjust the Alkalinity Target value to yield a mash pH of 5.1-5.3. The usual Target value is near 0, or in the range of -15 to 30.
The option for increasing carbonate is not normally exercised. The Carbonate Target value should usually be zero.
PROFILES pH Hardness Alkalinity Chloride Magnesium Sodium Carbonate
Source 7.2 100 mg/L 75 mg/L 20 mg/L 5 mg/L 5 mg/L 0 mg/L
Target 425 mg/L 0 mg/L 20 mg/L 5 mg/L 5 mg/L 0 mg/L
81 % HCO3 0 % CO3
LIQUOR TREATMENT
Enter the entire volume of brewing liquor to treat: 6.00 gallons

Add these amounts of Mineral Salts and Acid to adjust your brewing liquor to the Target profile:
10.0 grams Calcium Sulfate Anhydrous about 2.5 teaspoons

23 ml of 10% lactic acid about 4.6 teaspoons


or 1.5 tablespoons

Enter an "x" next to the Mineral Salts that you use to adjust your brewing liquor:
MINERAL SALT COMMON NAME FORMULA Anion Cation
x Calcium Sulfate Anhydrous "Plaster of Paris" CaSO4 0.2944 0.7056
Calcium Sulfate Dihydrate "Gypsum" CaSO4.2H2O 0.2328 0.5579

Calcium Chloride Anhydrous CaCl 0.3611 0.6389


x Calcium Chloride Dihydrate CaCl.2H2O 0.2726 0.4823

x Calcium Carbonate "Precipitated Chalk" CaCO3 0.4004 0.5996

x Magnesium Sulfate "Epsom Salts" MgSO4.7H2O 0.14 0.55

x Sodium Chloride "Kosher Salt" NaCl 0.3934 0.6066


Enter an "x" next to the Food Grade Acid that you use to adjust your brewing liquor:
FOOD GRADE ACID NOTES
85% lactic acid 85-90% C3H6O3 1020 mg/ml
x 10% lactic acid 120 mg/ml
85%phosphoric acid 85-88% H3PO4 1445 mg/ml
23% phosphoric acid 391 mg/ml
95% sulfuric acid 95-98% H2SO4 1766 mg/ml
citric acid, monohydrate .9143 mg/mgC6H8O7 914.3 mg/g

If Water Witch errors, check that for each Target Value that exceeds its Source Value an "x" has been entered next to the
corresponding Mineral Salt, or reduce the Target value to "0". Please report any other errors to vpb@vermontbrewery.com
Vermont Pub & Brewery makes Water Witch available to aid discerning homebrewers in tweaking
their brewing liquors to particular profiles. Thank us by supporting your local brewery. Slainte!
v101.0

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