- Joined
- Feb 18, 2017
- Messages
- 76
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I just brewed a milk stout and have had success with hitting my target ph with BIAB. Unfortunately, I am doing batch sparge equal runnings right now as a way of learning a new skill and the ph is way low compared to the estimate in Brewersfriend. It started 5.0 low and then slow rose to 5.15 instead of the 5.47 I was targeting.
I double-checked my work, my grist info and also the water source report (crystal geyser). It seems like I would have had to put in triple the amount of lactic acid (which I didn't) to make such a big difference. And, I did recalibrate my Milwaukee meter.
Here's the grain bill..
Amount Fermentable PPG °L Bill %
5.5 lb United Kingdom - Maris Otter Pale 38 3.75 79.1%
2.4 oz American - Caramel / Crystal 40L 34 40 2.2%
7.2 oz American - Caramel / Crystal 60L 34 60 6.5%
1.2 oz American - Caramel / Crystal 90L 33 90 1.1%
3 oz United Kingdom - Black Patent 27 525 2.7%
3.5 oz Lactose (Milk Sugar) - (late addition) 41 1 3.1%
6 oz German - Carafa II 32 425 5.4%
I added the water adjustments..
2 g Calcium Chloride Water Agt Mash 1 hr.
0.5 g Epsom Salt Water Agt Mash 1 hr.
2 g Gypsum Water Agt Mash 1 hr.
2 g Baking Soda Water Agt Mash 1 hr.
0.5 g Slaked Lime Water Agt Mash 1 hr.
2 ml Lactic acid Water Agt Mash 1 hr.
Any suggestions on what I can look at discover where I went wrong in the calculations or my process?
I double-checked my work, my grist info and also the water source report (crystal geyser). It seems like I would have had to put in triple the amount of lactic acid (which I didn't) to make such a big difference. And, I did recalibrate my Milwaukee meter.
Here's the grain bill..
Amount Fermentable PPG °L Bill %
5.5 lb United Kingdom - Maris Otter Pale 38 3.75 79.1%
2.4 oz American - Caramel / Crystal 40L 34 40 2.2%
7.2 oz American - Caramel / Crystal 60L 34 60 6.5%
1.2 oz American - Caramel / Crystal 90L 33 90 1.1%
3 oz United Kingdom - Black Patent 27 525 2.7%
3.5 oz Lactose (Milk Sugar) - (late addition) 41 1 3.1%
6 oz German - Carafa II 32 425 5.4%
I added the water adjustments..
2 g Calcium Chloride Water Agt Mash 1 hr.
0.5 g Epsom Salt Water Agt Mash 1 hr.
2 g Gypsum Water Agt Mash 1 hr.
2 g Baking Soda Water Agt Mash 1 hr.
0.5 g Slaked Lime Water Agt Mash 1 hr.
2 ml Lactic acid Water Agt Mash 1 hr.
Any suggestions on what I can look at discover where I went wrong in the calculations or my process?