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On Saturday, November 17, 2018 at 5:47 PM, Cato said:

Actually I think we're probably fine with extract and extract pm recipes. It's the all grain recipes that may need slight water adjustments.

I don't doubt that a bit. All I am clumsily trying to say is if you can add one step to your AG mash, I don't see how you or I could be far off from that number. Mother Nature, the maltster and chemistry do the work. In my inexperienced opinion, PH adjustments are for people who don't want to add that step.

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@Bonsai & Brew

May be of interest or not. A forum members response post from another site, where the OP had very low ph readings , 4.89, in his samples taken early in a cooler mashtun, but then got a 5.39 ph from the preboil wort in the BK. No sparge mash in the cooler mashtun for a pale ale.


I had not considered when would be the recommended time to take the mash ph readings, so I need to do some further readings, and to also see if the post below carries any weight. Good thing that I've got a little break before my next brew session!

"Pale malts are "effectively" basic with respect to typical mash pH targets. There is clearly no mechanismaside from acid addition or acid malt addition which could conceivably result in such a false low pH reading. I presume this might likely be a case whereby the requisite and pre-determined acid addition was made directly to the mash, and not to the mash water pre the mash, whereby it could receive adequate mixing to uniformly disperse it. Or a case of inadequate stirring during the mash. Or both. It is assuredly a case of premature sampling, which inevitably will yield a false low pH reading to begin with (whereby the solution to this delema is to never sample until at least 30 minutes have gone by in the mash, and to stir, stir, stir). If the pre-boil pH was 5.39, this reading is a much better reflection of the actual mash pH conditions. My preferred time to sample mash pH is at the 60 minute mark of the mashing step, but others agree that 30 minutes is the earliest sampling point with any level of validity.

Other reasons for a false low pH reading include:
1) Stirring the sample with the pH probe and taking the pH reading while stirring
2) Not allowing the pH probe to sit in an undisturbed sample for up to several minutes to fully stabilize
3) Reading pH on a sample that is above room temperature, and incorrectly presuming that ATC will correct for this."

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