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Attenuation Medium Gravity* 79% – 83%

Attenuation High Gravity* 76% – 79% (9.6% – 10.1% ABV)

Temperature Range† 60˚F – 72˚F

Flocculation Medium/High

Description: From one of the oldest Kölsch breweries in Köln. Fermenting under 65˚F produces a very clean, crisp beer with a touch of ester. Perfect for Kölsch or any style where a dry, clean profile is desired. GY021 produces a moderate amount of sulfide that will dissipate completely.

Representative Styles: Kölsch, Pale Ale, Alt, India Pale Ale, Cream Ale, Amber

* Attenuation was measured after 8 days with Ale yeast at 70˚F and Lager yeast at 50˚F. Medium Gravity is 14˚ – 16˚Plato. High Gravity is 23˚- 25˚Plato.

† The working temperature range represents the range at which fermentation for a given strain produces a typical attenuation- not necessarily the ideal temperature for your particular beer style. As a rule of thumb, start ale yeast fermentation at 68˚ – 72˚F and then lower or raise temp as desired. Lager Yeast are typically fermented at 45˚ – 58˚F. If desired, Lager Yeast can be given a “hot start” at 65-68˚F and then lowered to the primary temperature after active fermentation begins (10-20hrs).

GigaYeast laboratory is still gathering data on many of our strains. Information provided here may change some in the future. Please call if you need more info.

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