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Czech lager Weyermann #3B Gemini

Method: All Grain
Style: Czech Pale Lager
Boil Time: 90 min
Batch Size: 23 liters (fermentor volume)
Pre Boil Size: 30 liters
Post Boil Size: 23 liters
Pre Boil Gravity: 1.043 (recipe based estimate)
Post Boil Gravity: 1.056 (recipe based estimate)
Efficiency: 74% (brew house)
Source: Szommer Ákos
Hop Utilization: 98%
Calories: 185 calories (Per 12oz)
Carbs: 18.4 g (Per 12oz)

Created: Monday April 20th 2026

Original Gravity:

1.056

Final Gravity:

1.013

ABV (standard):

5.6%

IBU (tinseth):

44.5

SRM (morey):

5.8

Mash pH

5.5

Cost $

n/a

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Fermentables

Amount	Fermentable	PPG	°L	Bill %
5 kg	German - Bohemian Pilsner5 kg Bohemian Pilsner	38	1.9	90.3%
0.37 kg	Weyermann - Melanoidin0.37 kg Melanoidin	34.5	27	6.7%
0.17 kg	Weyermann - Carapils0.17 kg Carapils	34.5	2.1	3.1%
5.54 kg / $ 0.00

Hops

Amount	Variety	Type	AA	Use	Time	IBU	Bill %
78 g	Saaz78 g Saaz Hops	Pellet	3.5	First Wort	90 min	37.01	56.5%
30 g	Saaz30 g Saaz Hops	Pellet	3.6	Boil	15 min	6.17	21.7%
30 g	Saaz30 g Saaz Hops	Pellet	3.5	Hop Stand at 78 °C	15 min	1.32	21.7%
138 g / $ 0.00

Show Summary View

Amount	Variety	IBU	Bill %
108 g	Saaz (Pellet) 108 g Saaz (Pellet) Hops	38.33	78.2%
30 g	Saaz (Pellet) 30 g Saaz (Pellet) Hops	6.17	21.7%
138 g / $ 0.00

Mash Guidelines

Amount	Description	Type	Start Temp	Target Temp	Time
20 L	Fehérje	Strike	55 °C	55 °C	10 min
		Infusion	63 °C	63 °C	60 min
	Alfa amiláz	Infusion	72 °C	72 °C	20 min
	Mash out	Infusion	78 °C	78 °C	5 min
14 L		Sparge	78 °C	78 °C	--
Starting Mash Thickness: 3.65 L/kg Starting Grain Temp: 18 °C

Other Ingredients

Amount	Name	Cost	Type	Use	Time
3 ml	Phosphoric acid		Water Agt	Mash	0 min.
1 ml	Phosphoric acid		Water Agt	Sparge	0 min.

Yeast

Mangrove Jack - Bohemian Lager Yeast M84

Amount:	22 Grams	Cost:
Attenuation (custom):	75%	Flocculation:	High
Optimum Temp:	10 - 15 °C	Starter:	No
Fermentation Temp:	12 °C	Pitch Rate:	0.35 (M cells / ml / ° P) 111 B cells required

$ 0.00 Yeast Pitch Rate and Starter Calculator

Priming

Method: co2 Amount: 0.69 bar Temp: 2 °C CO₂ Level: 2.5 Volumes

Target Water Profile

BPXXII filtered

Ca⁺²	Mg⁺²	Na⁺	Cl^-	SO₄^-2	HCO₃^-
22	6	5	8	12	4.4
Mash Chemistry and Brewing Water Calculator

Notes

OG magasabb lett mint vártam, arányos alapanyag csökkentés lehetséges.

RO víz 25% bypass-szal (75% RO+25% szűrt csapvíz)

Foszforsav a cél PH szerint adagolandó.

Beoltás 11-13C fokon. Mivel két csomag az élesztő, nem kell hidratálni, csak szobahőmérsékletűre temperálni az oltás előtt.

kb 8 nap után, 1.020 SG körül hőmérsékletet lassan emelni 15-16 fokra.
14 nap után FG beáll, még 2 nap kondicionálás változatlan hőfokon.
Majd cold crash. 2 nap 1C fok.

Nyomás alatti erjesztésnél a gázképződés megindulásától (2. nap) fokozatosan 0,3-0,4 bar. Főerjedés csúcsától (kb. 4-5. nap) lehet emelni 0,9-1bar-ra, majd a 8. nap után a hőmérséklet emeléssel együtt 1,4 barra.
A cold crash alatt a cél. 0,8 bar. Szükség esetén korrigálni.
Ellennyomással palackozni.

Last Updated and Sharing

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Brews

Public: Yup, Shared
Last Updated: 2026-04-27 12:39 UTC

System Default

Recipe costs can be adjusted by changing the batch size. They won't be saved but will give you an idea of costs if your final yield was different.

Cost for

Gallons

Cost by

Final Yield

	Cost $	Cost %
Fermentables	$
Steeping Grains (Extract Only)	$
Hops	$
Yeast	$
Other	$
Cost Per Barrel	$ 0.00
Cost Per Pint	$ 0.00
Total Cost	$ 0.00

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