Sunday, November 13, 2016

EKA with acid corrections

It's November. Looking at the brew blog it appears I haven't brewed since July. I had a high grade tear of my dispel biceps tendon that I "acquired" in the gym. As such, I was unable to do anything with my arm for a few months. All healed up now.

Snikers lager was good. I was about to bottle it and enter in some competition. Then the keg blew. Such is life. This summer while at the Mammoth Blues and Beer fest I ran into the boys at White Labs and asked if they had any feedback about my apple ester. They said they get that when the pH gets too high. So I have since went out and bought some lactic acid. The goal here is to drop the pH in the mash to 5.2ish. I also bought some new pH strips. Those things get old after a while I think. I've done some calculations and I can expect about 0.07 lowering of pH per gram of lactic acid for the mash. I intend to mash in, check the pH, and then make corrections. I'll even check the wort after runoff.

8.5 lbs 2 row
1 lb C10
2oz German Hallertau 2.5%
WLP001 w/ starter (starter was made in the morning) - MFG: 10-11-2016 - Lot# - 1030256
Arrowhead spring water
Whirlfloc
Servomyces

Also got a new O2 stone. I think the last one broke.

4:01pm - I've already ground the grain. I'm now boiling the O2 stone and calibrating the thermometer.

4:40pm - We're mashed in. Mash temp 152. Needed to add a little cold water but not much. Pretty good for just eyeballing it. I checked the pH. It's about 5.2. I quite often check the pH right when I dough in and it always seems about 5.2. So, I guess I will keep checking to see when/if it changes.



6:36 - We are well into he boil now. Things are going well. The starting gravity was a little low. 1.033. I think it's because of the mill. I fiddled with it a bit. No matter. We will soldier on. After the mash was done I added about two gallons of spare water and checked the gravity again. You can see it's become a little more basic.


Then I check again after the first run off and the addition of the next spare water.


You can see if looks like it may be 6 or more. Then once more when it was all blended together back in the kettle.


Now I'm frustrated. Because we are shooting for 5.2 and by golly it looks like it is already 5.2. That can't be right. It's what we've always done. Well not this time. We came here to acidify this thing and now we will. Maybe I will invest in a better quality pH reader next batch. But for now we are going to add some lactic acid. I added 2g worth which should be about 2mL. Here what I measured after that.


It looks to me like the pH definatly dropped. I may add another later. Because why not.

8:10 - I added another gram. I mean, what are we doing here. Let's do this thing right. Beer is in the fermentation chamber. Cleaning up now.

9:00 - All done. I need to be sure to rinse the re-circulation portion of the chiller. Don't want things growing in there. Other than that it went smooth. Can't wait to see how it comes out. If this makes a difference then I will for sure purchase a fancy pH meter.

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