acarter5251
Well-Known Member
- Joined
- Dec 22, 2013
- Messages
- 296
- Reaction score
- 17
I recently brewed a couple 4 gallon batches on my Grainfather that had the same issues:
Batch 1 Grain Bill: Key Lime Saison (from BYO magazine recipe)
5 lbs 9 oz Belgian Pilsner
3 lbs Maris Otter
8 oz Caramel 40L
5 oz Flaked Oats
14 oz Lactose
Mashed at 150F 60 min
Used Belle Saison yeast (attenuation=77-83%) @ 72F
Expected/Actual OG: 1.066/1.061
Expected/Actual FG: 1.018/1.011
Batch 2 Grain Bill: Strawberry Milkshake IPA (based off BYO magazine recipe)
8 lbs 4 oz 2 Row
2 lbs Flaked Oats
12 oz Lactose
Mashed at 150F 60 min
Used a 1:1 blend of Conan and Sach Bruxellensis Trois @ 68F
Expected/Actual OG: 1.080/1.072
Expected/Actual FG: 1.023/1.013
As you can see, I missed the OG on both of these batches by about 7-8 points. Could the low FG be a result of the yeast attenuating equally well but with a low OG?
On the other hand, the lactose should not be fermentable and would be expected to contribute about 6 or so points for the batch, which would make the FGs about 1.005 and 1.007 respectively for the two batches?
At this point I am just trying to rationalize why my FGs are so low when I used a healthy amount of lactose in both batches.
Thanks in advance!
Batch 1 Grain Bill: Key Lime Saison (from BYO magazine recipe)
5 lbs 9 oz Belgian Pilsner
3 lbs Maris Otter
8 oz Caramel 40L
5 oz Flaked Oats
14 oz Lactose
Mashed at 150F 60 min
Used Belle Saison yeast (attenuation=77-83%) @ 72F
Expected/Actual OG: 1.066/1.061
Expected/Actual FG: 1.018/1.011
Batch 2 Grain Bill: Strawberry Milkshake IPA (based off BYO magazine recipe)
8 lbs 4 oz 2 Row
2 lbs Flaked Oats
12 oz Lactose
Mashed at 150F 60 min
Used a 1:1 blend of Conan and Sach Bruxellensis Trois @ 68F
Expected/Actual OG: 1.080/1.072
Expected/Actual FG: 1.023/1.013
As you can see, I missed the OG on both of these batches by about 7-8 points. Could the low FG be a result of the yeast attenuating equally well but with a low OG?
On the other hand, the lactose should not be fermentable and would be expected to contribute about 6 or so points for the batch, which would make the FGs about 1.005 and 1.007 respectively for the two batches?
At this point I am just trying to rationalize why my FGs are so low when I used a healthy amount of lactose in both batches.
Thanks in advance!