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Old 10-31-2012, 07:40 PM   #11
helibrewer's Avatar
Nov 2011
Santa Rosa, CA
Posts: 3,813
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If you have a winemaking shop nearby you should be able to find 25% Phosphoric Acid, it's used for wine lab work. Having it shipped usually involves Hazmat fees that make it quite expensive.
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Old 10-31-2012, 08:24 PM   #12
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Feb 2011
Carmel, IN
Posts: 4,306
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Shipping is only expensive because of the hazardous goods issue when the quantity is over a gallon. If acids are purchased by the quart, there is not typically a hazardous shipping fee. I have purchased 85% phosphoric from Duda Diesel and it was quite reasonable.
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Old 11-02-2012, 01:02 PM   #13
Dog House Brew
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Jun 2008
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What is the common % phosphoric used in brewing? I guess I will buy some and start using my ph meter that has been in the box for a year?
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Old 11-02-2012, 01:39 PM   #14
Aug 2010
McLean/Ogden, Virginia/Quebec
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It varies. The technical grade stuff I use in the brewery to remove beerstone is 75%. The reagent grade stuff I have in the lab is 80%. Homebrew shops sell more dilute solutions perhaps 40%. Go on line to some of the larger homebrew suppliers.

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Old 12-05-2012, 03:02 PM   #15
Jul 2011
plano, il
Posts: 36
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Update: Being more informed regarding water, I had adjusted using adding distilled to tap water and adding calciim chloride based on EzCalc and Brun n Water sheets. I have brewed two beers, flavor has vastly improved and a bonus has been increased mash efficiency, 80%.

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