Yeasts are micro-organisms used in brewing to produce alcohol during the process of fermentation.

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Is my fermentation on the right track?

I upgraded my equipment and estimated my new efficiency a bit too low, so the imperial IPA that I brewed on 11/30 ended up having an O.G. of 1.10 (supposed to be 1.09). I made a two step starter with ...
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Why does my witbier stink?

I've searched far and wide and can't find a good answer. Seems to be a lot of talk about the sulphur smell I noticed during fermentation, but this is a bit different. Brewed this masterpiece up and ...
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What does high attentuation actually mean in terms of types of sugar fermented?

So, when I fermented a cider it ended up very dry. I used champagne yeast and only added pure glucose. I then added lactic sugar since I knew that wasn't fermentable by the yeast I used. I also have ...
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191 views

Is fermentation 'done' even without there being cake?

This one has me questioning what I thought I knew. Brewed a "mocha stout" 4 days ago: Steeped: - .5lb chocolate malt - .375lb roasted barley For boil, added: - 6lb DME (dark) - 1lb lactose At ...
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Do I need to double the yeast when splitting the batch into two fermenters?

I am brewing 5 gallon batches. I end up with 5.5 gallons after the boil so I split the batch evenly into two(2) Corney kegs fitted with an air lock on each gas in. I ferment in the two kegs and then ...
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133 views

Can I buy White Labs “Platinum Strains” yeasts in their seasonal availability window every year?

I am looking at the White Labs WLP076 (Old Sonoma Ale), and see that it is available May-June. My LHBS, which also happens to be a natl. mail order shop, does not have it available. I see some online ...
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Pitching Whole Starter vs Cold Crashing Effects on Taste

Earlier, I made a thread trying to find a reason for a yeast/green apple flavor in my beer.. After a lot of thought and poking around, I have an idea of why this is, but I wanted your opinions on ...
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Using two kit cans should I use both yeast packets and how much sugar

I have seen some people online using two kits to make one 23L batch of beer with more flavor than a single kit. If you use one kit to make 23L you add the yeast supplied with it and 1kg of dextrose ...
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Yeast comparison source

Is there a good source that compares the commercially available yeast strains from the most common sources like White Labs and Wyeast? I am thinking of something with homebrewing experience built ...
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Can I heat a starter in an erlenmeyer flask on an electric stove?

My dad found an old Kimax (26500) 1000mL Erlenmeyer flask that has been in his attic for the last 30 or so years and gave it to me. I'd like to start using this to make starters, in conjunction with ...
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51 views

Yeast starter with YM-Medium under aerob conditions?

As far as I know the most common yeast starters are malt extracts which are sealed with an airlock. But the few times I worked with yeasts in the lab we used YM-Medium (Yeast extract-Malt extract) to ...
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308 views

What are the characteristics of baker yeast?

I am looking to brew some ginger beer and other simple stuff. I wonder what are the characteristics of baker yeast? Will they do for a cyder beer ? What are the disadvantages? In Europe we have ...
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Scaling recipe ingredients to smaller batches? How do AAUs scale?

I plan on brewing 1 gallon batches. The problem is that most recipes are for 5 gallon batches. The scaling seems obvious: divide the amount of each ingredient by 5. With this in mind, a few ...
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3answers
194 views

ReaLemon's preservatives

I'm trying a simple recipe for ginger beer (Method 1 here). Would using ReaLemon be ok instead of an actual lemon? I understand that preservatives in an apple juice can harm the yeast when making ...
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1answer
478 views

I moved a Kolsch to secondary after 4 days. Should I repitch yeast?

This is my first batch ever, a Kolsch from a kit. It fermented like crazy the first 2 days, but after 4 had stopped bubbling, so I moved it to a secondary container. As I was transferring, I noticed a ...
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Using trub directly vs. yeast rinsing.

Sometimes referred to as "yeast washing," the process of yeast rinsing separates the yeast from the hops and break material in the trub. Most brewers who reuse yeast — and store it for long ...
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227 views

How to know how much starter to make from harvested yeast?

There are plenty of calculators that tell you how much starter to make for a specific amount of starting yeast and for a specific gravity of the wort. On packages/vials of yeast it tells you the ...
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If I live in a country where alcohol is prohibited, how to I deal with these obstacles? [closed]

I will have access to wheat and barley, only fresh, nothing malted. I have been reading online a little on malting. So this step doesn't seem to be an issue. My real issue is yeast. Assuming that all ...
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834 views

What is the proper way to supplement a yeast starter with oxygen via an aeration stone?

I have two yeast starters going on my two homemade stir plates. The stir bar or the stir plate for one of them is malfunctioning and I can not increase the speed enough to get a vortex going. It is ...
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879 views

Adding boiling water to raise temperature during fermentation

Beer was getting cold so in a desperate attempt to raise the temperature I put near boiling water into the container. So 450ml into 23litres of beer. The beer had only been brewing for 4 days. Will ...
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797 views

What happens if I Double Brown Ale

I'm thinking about making something like Frambozen from New Belgium from brown ale and added raspberries. However it's more of a sipping beer / higher alcohol content than the regular brown ale. ...
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Does suspended yeast contribute to high SG?

I've got a SMaSH beer (Baird Maris Otter and EKG) finishing in primary. It's been fermenting for just over a week. Starting Gravity was 1.046. I mashed at 154F for 60 minutes. Fermented with WY1335 ...
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How long does harvested yeast keep

Just like the title says: how long does harvested yeast keep? I am assuming to keep the yeast you have to store it in the refrigerator, right?
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Which strains of yeasts are the cleanest for warm/hot fermentation?

I am from Puerto Rico and the temperature here is like summer all year round(between 75 to 95*F) , and I really want to know the cleanest strains of yeasts for this kind of temperature. (clean ...
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What's the best method to catch a strain of wild yeast for homebrewing?

I'm interested in learning about brewing using wild yeast, but I wonder what is the best method to catch a strain that would produce good results in homebrewing. And of course how to ensure that it ...
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219 views

Vacuum sealing harvested yeast

Looking at this video I had the idea of vacuum sealing yeast that I harvest from my beer batches to better protect it from bacteria/mold. My plan is to rinse the yeast with boiled (sanitized) water ...
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Pitched yeast into head of wort, will this delay/ruin its effect?

I am a first time home-brewer. Followed the instructions to the letter. When I added the cold water I "splashed" it in to aerate it. The wort had a large head at the time of pitching the yeast. Will ...
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195 views

Does Thomas Hardy use a separate bottling yeast strain?

Combing through the miriad different ideas about brewing a Thomas Hardy clone, I've become confused about what the consesus is about how "the real thing" is brewed. WLP099 is associated with "Thomas ...
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Where can I find information about the yeast Saccharomyces Bayanus?

I was able to find plenty of information about the ale yeast S. Cerevisiae and lager yeast S. Pastorianus, however information about the wine making yeast S. Bayanus appears to be more difficult to ...
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does starsan kill yeast

Is Starsan effective against yeast? After resuming homebrewing again after a 2 year break, I started having pellicle appearing on my starters (after fermentation had completed), which has now spread ...
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Bad (dead) yeast? What now?

Brewed an ESB yesterday, pitching Wyeast 1028 @ 70 degrees F. Stirred and shook carboy for oxygen, then airlocked and moved moved to the basement. This morning, carboy is @ 71 degrees F with NO ...
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Purposely underpitching

So I am planning a roggenbier, partially because I want to try one, but largely to grow up a cake to make 15 gallons of weizenbock. Hefe's are ok in my mind, but my palette basically just wants ...
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When should I add orange peels to my homebrew?

I've been planning to experiment with orange peels for a while now, but I don't know when to add them, when should I throw them in? Last 15 minutes with the aroma hops? At flame-out? After primary? I ...
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Pitched Yeast at 80-85 deg. Problem?

I pitched English Ale yeast (white labs) around 80 deg, not realizing it was that warm. Relative temp in the room is 68, but wort will not cool down below 80....strange! Its been about 24 hours at ...
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How long can a yeast starter stay on a stir plate before pitching?

Two days ago (on Wednesday night) I made a yeast starter on my stir plate. I purchased a thermometer probe that I intend on modifying a fermentation bucket with, which I thought it would arrive today ...
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Why Wouldn't Chilling a Yeast Starter Cold Crash or Inactivate the Yeast? [duplicate]

We boil DME and water to make a solution with an OG of 1.040, pitch the yeast and place it on a stir plate for a couple of days to make our yeast starters. After this, it is commonly suggested to ...
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544 views

High OG content for yeast

I had a higher than expected OG in my homebrew. It was estimated to come out to 1.060 but instead ended up at 1.076. The back of the yeast I used said that it is good in a brew of up to 1.060 OG. The ...
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Shaking vs not shaking

I'm playing with a yeast starter right now and I've noticed when I shake the mix the yeast gets more active. I'm wondering how this applies to my actual fermentation. So I was thinking I'd let my ...
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Total Volume of Yeast Starter in Regards to Evaporation from Boiling Wort

Today I did my first yeast starter. I purchased the 2000mL flask and DME from northernbrewer, and it came with instructions for doing both 1000mL and 2000mL batches. It suggests 1000mL for 5 gallons ...
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447 views

Yeast Starter Vortex Size

I've read online that the size of the vortex in a yeast starter does not matter. Why is this true? When I was experimenting with water yesterday, I created a monster vortex (very cool) and could see ...
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570 views

Flowers of Wine (Problem)

Context: I am currently working on a batch of jalapeno-cranberry wine. It's been in primary for five days so far and I am beginning to suspect I have flowers in my wine. I was not too concerned ...
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Pausing a ginger beer plant

I am making ginger beer, the old fashioned way with a plant. The plant is a jamjar which I feed with one teaspoon of sugar and powdered ginger daily. I'm going on holiday soon, for several weeks. ...
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Yeast starter left out of refrigerator, is it OK?

I created a yeast starter from some yeast from my primary fermenter and some DME following standard steps and the fermentation looked great. However, I went on vacation and forgot to put my yeast ...
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Lager yeast fermenting at 25-30C

The summer is approaching, and I would like to make some experiments using lager yeast, just completely out of its temperature range. I guess that steam bear was made using lager yeast at higher ...
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“Quiescence Yeast” Or will my yeast-to-be survive a travel to the caribbean?

This is a related question, but not a usefull one to me :( I intend to buy liquid yeast from northenbrewer (WLP099 in case you wonder) and I currently live in Venezuela, a very hot and sunny place ...
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Wyeast pack arrived already inflated - keep in the fridge or not?

Like the question says, the pack arrived pre-smacked! I'm making a yeast starter before I brew so that'll tell me whether the yeast is ok, but what I need to know is whether to keep it in the fridge ...
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What volume of brewer's yeast to use for yeast-nutrient-less dandelion wine?

I'm trying my first, 1-gallon batch of dandelion wine. Some recipes say "1 packet" of brewer's yeast, and mine doesn't even specify an amount. It also specifies to add "yeast nutrient," which my ...
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Dropped the temperature as it was getting out of control, did I shock my yeast?

Making an IPA with an OG of 1.069, we pitched at 70°F with good ol' Safale US-05, just dry out of the packet as I've always done with US-05 with good success (I tend to trust it a little too much ...
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270 views

yeast cell count importance

I have a had a question for quite some time that nobody has been able to answer. The question is more academic or theoretical than it is practical. Perhaps the community here is a tad smarter ...
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876 views

Wyeast 2124 Bohemian Lager for Bock - too late for diacetyl rest?

I really wasn't ready to do a lager, but I wanted to do a Bock, so I requested California Lager yeast. My supplier failed to make the substitution and sent me home with Wyeast 2124 Bohemian Lager. I ...