Brew Date
September 22, 2024
Tap Date
November 8, 2024
Attenuation
76.7% apparent
63.2% real
Fermentables
Bohemian Pilsner
Weyermann21.75 lbs|89.7%
Carapils/Carafoam
Weyermann1.50 lbs|6.2%
Hops
1.75 oz
Saaz 2.4%
90 min First Wort
1.00 oz
Saaz 4.9%
90 min First Wort
0.60 oz
Magnum 16.8%
60 min Boil
4.00 oz
Saaz 1.7%
30 min Boil
2.25 oz
Saaz 4.9%
30 min Boil
4.00 oz
Saaz 1.7%
15 min Boil
4.00 oz
Saaz 1.7%
20 min hopstand @ 175°F
Non-Fermentables
0.06 g
Epsom Salt (MgSO4) Water Agent
Mash
6.00 ml
Lactic Acid Water Agent
Mash
0.03 g
Epsom Salt (MgSO4) Water Agent
Sparge
2.57 ml
Lactic Acid Water Agent
Sparge
Yeasts
264 ml
UrkelL28
Imperial Yeast
Equipment ProfileGeoff's Electric Equipment
Evaporation Rate
4.75%per hour
Trub Chiller Loss
0.26gal
Mash Profile Decoction, Triple - Undermodified Malts - Batch Sparge
Mash Steps
Step 1
Protein Rest25 min
122°F
Step 2
Beta Rest30 min
145°F
Step 3
Alpha Rest30 min
155°F
Step 4
Mash Out20 min
168°F
Fermentation and Aging
General Info
Decoction volume = total mash volume * (target temp - start temp) / (boil temp - start temp). Spund when at 1 P from target gravity (~ .002 SG).
Name is an English translation of a Czech saying - Čumět doblba.
Need to add ~ 25% over decoction calculations. Consistently under target for each temperature rest for this brew. The future addition of the HERMS coil will help with this.
Procedure
Mash-In target: 122°F
Decoction schedule:
- Thick - 145°F (actual 142°F); (11.5 * 23 / 78) + 20% = 4.00 gallons
- Thick - 155°F (actual 152°F); (11.5 * 14 / 45) + 20% = 3.60 gallons - added 1 gallon @190°F to bring to 152°F
- Thin - 168°F (actual 166°F); (12.5 * 16 / 32) + 20% = 6.5 gallons
When the decoction is added back to the main mash, do not add all at once. Instead, add in steps while checking the temperature of the mash. Let any remaining decoction cool to desired step temp and then add in.
Decoction volume calculation used = total mash volume * (target temp - start temp) / (boil temp - start temp) and add 20%.
Guidelines:
- Always pull at least 1/3 of total mash volume as decoction (4 gallons for this recipe).
- Pull the first and second decoction thick and the third decoction thin.
- Make sure you measure your volumes exactly, work quickly when mixing back, but also mix thoroughly.
when doughing in, give the enzymes some time to get dissolved before starting to pull your first decoction.