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Old 11-24-2010, 07:16 PM   #1
CyclingCraig's Avatar
Dec 2007
Hillsborough, NJ, New Jersey
Posts: 120
Liked 10 Times on 9 Posts

Just looking for a sanity check on my numbers.

Brewing Black Widow Porter from Jamils' BCS book

Starting Water:
Ca: 32
Mg: 11
Na: 29
Cl: 50
SO4: 42
CaCO3: 72

Mash Water: 5.17
Sparge Water 4.2

Total Grain: 13.8 lbs
Crystal Grain: .9 lbs
Roasted Grain: 1.1
SRM: 35

Additions: (Mash / Boil)
Gypsum(CaOS4) 1 / .8
Calc Chloride (CaCl2) 1 / .8
Baking Soda (NaHCO3) 3 / 0

What do you guys think ?

Reason: Added image for water calcs

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Old 11-24-2010, 07:22 PM   #2
Beerrific's Avatar
Mar 2007
Posts: 5,562
Liked 54 Times on 46 Posts

I brewed essentially that recipe with water adjusted to:

Ca: 47
Mg: 1
Alkalinity as CaCO3: 22

I read the mash pH and it was 5.15 at mash temp. So that is about 5.45 at room temp. That would have been fine, but I added 2 grams of baking soda and go to 5.24 at mash temp or about 5.54 at room temp. Anyway, what I am saying is that since you have more buffering capacity in your water, you probably don't need any baking soda at all.

My experiences here:

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Old 11-24-2010, 08:09 PM   #3
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Bobby_M's Avatar
Aug 2006
Whitehouse Station, NJ
Posts: 23,294
Liked 1738 Times on 1103 Posts

I agree with beerrific on potentially not needing the baking soda. I'd leave it out and check the pH even with a cheap strip. If it's over 5, I'd call it fine.
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