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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Gypsum Or Lactic Acid?
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Old 09-16-2013, 11:27 AM   #11
tagz
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You should really use a water spreadsheet. Is a bad idea to go off of someone else's measurements because they are using a different water source than you. Look up your county water report and download bru'n water.

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Old 09-16-2013, 04:04 PM   #12
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Next time you're at the drug store or vet, ask for a little 1 mL plastic syringe doser. You really need this level of accuracy. Then figure out how much acid you need to drop your water to the desired pH. For example, I found that I need like 0.6 mL/gal to get down to pH of 6.0 for sparge water. Don't use my numbers since it depends on mineral content of your water.

If you're using lactic acid for your mash (instead of acid malt) then you really need to use one of the spreadsheets and develop a base of experience with it.

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Old 09-16-2013, 04:04 PM   #13
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Any calculation or spreadsheet is useless if the input data is not valid. Be sure to get good data. The very best approach to acidification is to gauge the additions with a pH check of the mash. But in the absence of that tool, a spreadsheet may provide a good estimate.

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Old 09-17-2013, 02:13 PM   #14
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Quote:
Originally Posted by mabrungard View Post
Any calculation or spreadsheet is useless if the input data is not valid. Be sure to get good data. The very best approach to acidification is to gauge the additions with a pH check of the mash. But in the absence of that tool, a spreadsheet may provide a good estimate.
Indeed. Check your work.
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Old 09-17-2013, 05:51 PM   #15
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Quote:
Originally Posted by junior View Post
Yooper,
I have lactic acid, so I was planning on using 1tsp for 15qts of strike water to 9.5lbs of grain. O, forgot to mention I want to drop PH from 6 to 5, what do you think.
It all depends on what your water is like and the grist you're using.
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