Here is the question that has been bugging me lately. Even using Brun' Water I rarely hit my target. I have written to Martin about it and re-tested my water so I must be doing something else wrong. But regardless, I pull a sample about 15 minutes into the initial mash rest, cool it over ice water, take the measurement. Once I know what adjustment to make, it ends up being 25-30 minutes before I can nail my pH. Does this cause any issues? Ideally I would nail the pH target immediately but since I am sometimes high and sometimes low, I can't exactly make a blanket adjustment in advance. In general, my new theory is to stick with absolutely minimal adjustments. I think part of my problem has been TOO MANY adjustments.
For example on a recent Wee Heavy I had 10 different grains in my malt bill - 45 pounds on a 12G batch.
I wanted to accentuate body, maltiness, roundness, sweetness, etc. In order to hit a 5.4 mash pH I had calculated the following additions (added to mash only) with pretty soft/clean Portland water:
- Gypsum - 4g
- Calcium Chloride - 8g
- Epsom Salt - 6g
- Baking Soda - 5g
With these additions I should have produced the following mash water:
- Calcium - 66ppm
- Magnesium - 11ppm
- Sodium - 27ppm
- Sulfate - 77ppm
- Chloride - 90ppm
- Bicarbonate - 82ppm
20 minutes into the mash my first pH reading was 5.7. I was able to get it down to 5.4 using 3/4tsp of Lactic Acid. But that adjustment took place 1/2 way into the mash. Should I not worry about the 30 minutes of the mash sitting at the higher pH?