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GigaYeast Double Pitch - GY021 Kolsch Bier

GigaYeast Double Pitch - GY021 Kolsch Bier

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With 200 Billion Yeast Cells per pack, the Giga Yeast Gold Pitch features nearly double the cell count of other liquid yeast producers. This equals faster starts, better flavors, and more insurance that your beer is going to turn out well. Double the yeast for just a little more money.  Smart brewing.

The Kolsch Bier Strain
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.

More On Cell Count
200 Billion cells per pouch means that with one pounch you can attain the gold standard of pitch count. The ideal pitch rate is .75 million yeast cells for every milliter of wort  times degrees plato for nearly any beer you will make. 200 billion yeast cells is also fantastic if you are making 5 gallons of high gravity beer and don't have time to make a starter.  Saves money if you are making 10 gallons and only want to buy one yeast. Getting twice as many cells per pack versus the other brands is also a great idea for mail order shipment, which can be a little tough on liquid yeast.


Attenuation Medium Gravity*:  79% – 83%
Attenuation High Gravity*: 76% – 79%  (9.6% – 10.1% ABV)
Temperature Range†:  60˚F – 72˚F
Flocculation:  Medium/High

Style Uses:

  • Kolsch
  • Alt
  • Cream Ale
  • Pale Ale
  • India Pale 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).


For best results we always recommend ordering an ice pack with your liquid yeast.

Item # GY021
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.35 LBS
Community Q&A

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Why did you choose this?
MoreFlavor Store
Previous use led to successful beer.
Valued C on Aug 28, 2019
Have not used this brand before. Wanted to see how good it is.
Michael G. G on Jun 26, 2019
Previous use led to successful beer.
Valued C on Aug 28, 2019
good value, it's a double pitch
STEVE F on Aug 28, 2019
Have not used this brand before. Wanted to see how good it is.
Michael G. G on Jun 26, 2019
Love this yeast.
Michael P on Jun 3, 2019
Came recommended
shawn r on May 14, 2019
random pick of the 4 options
John E on May 13, 2019
works well.
Michael P on Jan 8, 2019
Works well
Michael P on Mar 27, 2018
Wanted to try Giga Yeast
Mr. S on Mar 27, 2018
Double count, save some money
Michael P on Mar 6, 2018
good value, it's a double pitch
STEVE F on Aug 28, 2019
Love this yeast.
Michael P on Jun 3, 2019

3.7 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Very disappointing...
I've never written a review before. I wanted to like this yeast. Why wouldn't I...? Nothing gives me more pleasure than finding a product that works as good or better than the big brands but at a better price. I want to support these kinds of products and companies. But my personal experience with this yeast--and again, this is just one person's experience--was truly disappointing. I've made many Kölsches before and love the style. I've had good results with WLP029 and Wyeast 2565. But as suggested above, I wanted to try something new and I also didn't want to take the time make a starter (which I always do). Anyhow, I made my wort as usual, chilled, aerated with oxygen, and pitched at about 65F. Then I waited. And waited. And waited... At about 60 hours after pitch, there was absolutely NO sign of activity--nothing going on in the airlock and the surface of wort was still as glass. I decided to stir and rouse the yeast, and I also raised the temp to about 68F. Went to work. Returned home to active fermentation. But the smell, OMG... I don't know how else to describe it other than it "smelled of death." Like something dying. I also noticed the krausen never got as high as on most of my brews. Just a subjective observation... Anyhow, a week later and nearing terminal gravity, I took and reluctantly tasted a sample. Awful. Again, I don't have the words, but it just tasted "wrong." Maybe "chemically...?" Anyhow, I just let it sit in primary and a month after brew day, I kegged it today. Tested (1.013) and tasted again: Not quite as awful but still very, very bad and indescribable; nothing that suggests Kölsch, or even "beer" for that matter... I'm just going to lager it forever and hope it improves. Some day... I wish GigaYeast the best of success and, clearly, others are having better results. But for me, I can't risk it again. I put a lot of thought into my recipes and valuable time into my brew day, to say nothing of the financial costs. FWIW, I've been brewing for nearly seven years and have had only one infection that I can recall, in the early days. I can't think of any cleaning or sanitation differences between this brew and a hundred others--I do it the same way every time and I don't cut corners. It's possible the yeast was damaged during shipment, but I ordered it with an ice pack (which, ironically, I usually don't...). The yeast was also manufactured 60 days before brew day which isn't ideal, but I'd still expect at least 50% viability. And with 200 billion cells...?
September 22, 2019
5 months ago
I brewed up a 10 gallon batch of kolsch and split into 4 X 2.5 gallon fermentors where I pitched US-05, WLP029, Wyeast #2565, and this one. This strain was the best by far. Please be aware that this was a slow starter, but it finished very clean.

I plan to use this unless I find something better for all my future Kolschs.
August 5, 2018
1 year ago
First time using Giga Yeast but it was easily the clearest I've pulled from the fermentor. If their other strains are like this, they will become my favorite producer.
7 days after primary fermentation.  Easily the clearest beer I've pulled.
7 days after primary fermentation. Easily the clearest beer I've pulled.
March 10, 2018
1 year ago