Now, I am not claiming any experimental data, only what I observed on a recent brew of my american blonde ale this summer and wanted to report it.
I set up my water profile to hit a 5.4 pH as I do with a lot of styles. I had brewed this recipe about 2 mos prior to this and hit it dead on. After 15 minutes, I pulled a sample for testing, and only achieved a 5.08. I added about 1 gram of baking soda back to the mash, measured again 15 minutes later, and was sitting at a 5.9. So, now I am all over the place with regards to pH. Stupid me, adds some lactic acid, and it plummetted down to a 5.01, where I left it for the remaining 30 minutes (albeit frustrated). I typically do not chase the pH around like this, but was making the beer for a friends wedding and really wanted to produce a good product for him.
Sparge and boil went fine, but came up about 4 gravity points low (1.046) on an intended 1.050 OG (probably due to being a bit out of range for conversion, I thought). Everyone always talks about how a 5.2 mash pH can lead to a tartness in the beer, so I was expecting that.
Long story short, served it at the wedding and I did not pick up any off-flavors (even after 10 beers
). Sent it off to a comp for judging, and it took a gold in its category against american pale ales. So herein lies my quandary....
Do we as home enthusiasts (and possibly wanna be scientists), over emphasize the importance of mash pH, or does the mash pretty much work itself out providing you mix it with warm water and rest? I do understand that beers can be improved per style based on a proven mash pH, but sometimes I feel that it doesn't always make a difference. Is this just another case of too many variables to really focus on?
What thoughts do you have?