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

learn more… | top users | synonyms

3
votes
1answer
340 views

How long to keep in blowoff tube?

Today I learned what happens if there's too much yeast and a container too small (I have a 1 gallon batch). So according to instructions I sanitized a hose and connected the hole in the fermentor and ...
5
votes
3answers
5k views

How much distillers yeast do I use in a 5 gallon batch of beer?

The recipe I'm working on calls for the use of distillers yeast half way through my primary fermentation (among other things like plenty of sugar, aeration, etc...). Problem is, it doesn't really ...
7
votes
5answers
930 views

Is a yeast starter required when brewing a lager?

Is using a yeast starter 100% essential when brewing a lager or can you use a few liquid vials?
21
votes
4answers
667 views

Open-Fermented or Native Yeast Beers

I've always been very careful about control and sanitation with beer. But with my wine I do some native yeast Pinots, and some friends of mine are into the same with beers- they like funky, ...
3
votes
2answers
336 views

Rescuing a weak lager fermentation

I'm currently fermenting a spiced dark lager with an original gravity of 1.064. I began fermentation 2 weeks ago today with a White Labs 830 yeast that I made a starter with. The yeast was a bit old, ...
5
votes
2answers
855 views

Will Jalapeno or Habanero peppers adversely effect yeast

I have a recipe in front of me for a Saison of the spicy variety. It calls for the addition of one Jalapeno pepper, seeds included. First off, I do enjoy a fair amount of spice (far more than anyone ...
2
votes
1answer
154 views

Off flavor of kegged Wheat beer

I brewed an AG wheat beer and used WLP351 as the yeast for this. Let it sit in the primary for near two weeks (66°F/19°C) and I did do a secondary on it for about another weak to try and decrease the ...
2
votes
1answer
90 views

Is it normal for WY2112 to stall?

I've made three batches with the same colony of WY2112, and each one of them has exhibited the same odd behavior. I pitch a good quantity of yeast into oxygenated wort at 65 degrees F. Within 24 hours ...
1
vote
2answers
257 views

I pitched my starter when it was too hot. Is it still ok to use?

I'm making my first starter and I accidentally pitched the yeast when the wort was still warm. I've had it on the stir plate for 24 hours and then a 30 minute rest. See picture, is it still ok to use ...
0
votes
1answer
105 views

Yeast Ok After Being Near Freezing?

I have some California Ale Yeast WLP001 that I accidentally put in a corner of my fridge that is near freezing and it has been there for about a month. It's still in liquid form, so I think it should ...
1
vote
4answers
3k views

Measuring yeast activity by collecting CO2

I've been thinking about ways to measure the progress of the primary fermentation, looking for an alternative to taking samples and measuring the gravity. I was wondering if anyone has tried to ...
20
votes
9answers
10k views

Brewing Solid Things: Can Leftover Yeast Be Used for Bread?

I find myself baking a couple loaves of bread just about every weekend. Has anyone tried reusing their yeast from brewing for baking bread? I've heard that using some of the spent grain in bread ...
1
vote
3answers
2k views

Is 2 hours cooling the wort before adding yeast too long

I forgot about the warmer tap water and found my wort was way too hot and even after adding ice and standing the fermenter in ice water it took nearly two hours before is was the right temperature so ...
2
votes
1answer
536 views

How long to ferment for?

I made a coopers IPA can 2 days ago and it's currently fermenting away (bubbles every few seconds) and is at around 21-24 deg c (69-75 deg f) which is what it says as the label. The can says to ...
2
votes
2answers
255 views

Pitching yeast the next day?

If I wake up and decide to brew an impromptu batch, can I begin a starter at the same time and just pitch the next day? Seems comparable to no-chill brewing as far as contamination concerns, though ...
4
votes
3answers
742 views

Would Lalvin's 71B-1122 make a good cyser?

From Lalvin's website: ...has the ability to metabolize high amounts (20% to 40%) of malic acid. It also says that it produces "rounder, smoother..." wines. I'm thinking this would be a nice ...
7
votes
3answers
2k views

What is the minimum amount of time required for a yeast starter?

It is generally advised to leave a yeast starter for at least 24 hours to get optimal yeast growth. If I only have a few hours, is there any point making a starter from my liquid yeast pack? Is ...
3
votes
2answers
401 views

Yeast harvesting

I have just read an article about harvesting yeast (http://www.homebrewtalk.com/entries/yeast-harvesting-novel-approach.html). The author talks about making a starter and taking a part of the starter ...
1
vote
3answers
1k views

US-05 Fermentation Temps

On the package of the US-05 it says it's temperature range is 58-75F. However, all the reading on forums I am finding people tend to the lower end of the spectrum, even calling upper-60's to be too ...
0
votes
2answers
311 views

Should I be disappointed?

Just started, so my question is very basic. I got Coopers Lager Kit, did everything by instructions, temperature has been stable at 22-24C but gravity doesn't go down. OG was 1.039, dropped to 1.020 ...
1
vote
2answers
525 views

Kill yeast in keg

I've got a batch of cider that I've kegged. I did so at about 1.011 (OG was 1.052 IIRC). While the yeast activity will decline as the keg chills, I'd like to stop it completely so that I can bottle ...
13
votes
5answers
5k views

How do I culture yeast from a commercial beer? Is it legal?

If I like the flavor profile of a yeast in a commercial beer, how would I go about culturing it? I have some very basic lab equipment, but I can buy anything that's reasonably priced. Also, would it ...
10
votes
4answers
1k views

Should you rehydrate dry yeast?

I've read conflicting opinions on whether or not to re-hydrate dried yeast. I've had successful fermentation with dried yeast in the past but have not tried re-hydrating. Has anyone had better/worse ...
7
votes
2answers
2k views

Do commercial breweries stir in their fermenters to expose more yeast to the wort?

I noticed that ale yeasts, so called top-fermenting yeast, floats to the top. Does this mean that the yeast only works on the wort near the top of the fermenter? Assuming that no oxygen or bacteria ...
3
votes
1answer
404 views

How do you harvest yeast from a commercial beer?

I've done yeast starters and I've re-used yeast beds but I have never previously harvested or captured yeast from a commercial beer. I tried it last night, inventing my process as I went but I'm ...
1
vote
2answers
231 views

Slow temperature rising vs equivalent fluctuations

I've read a few accounts of brewers using slow temperature increments to bring out particular flavours from the yeast that they're using. For example, stepping up 1C or so every day over a few days. ...
2
votes
1answer
532 views

Use of servomyces in a yeast starter

1 servomyces capsule is the correct dose for 5 galons of wort. If I want to add servomyces to my 1.5 litre yeast starter should i break open the capsule and use only part of it? or is it safe to add ...
0
votes
0answers
37 views

Reusing vs using new yeast [duplicate]

Possible Duplicate: How many times can yeast be reused? I have read in a couple of places that you should only reuse yeast a couple of times - most say up to 5 times because you would get ...
3
votes
5answers
348 views

What are the possible consequences of putting dry yeast straight into the wort?

I always put my dry yeast directly into the wort, even though the packaging says to rehydrate it first. I've never had (noticed?) any problems with fermentation. What could this habit cause to go ...
3
votes
2answers
2k views

Yeast Starter with Dry Yeast (S-04)

I know the common wisdom is you shouldn't do this, but I am brewing two mid-to-high gravity beers on Saturday (1.065 and 1.072), and only have one packet. I am now chilling a 2L starter that I was ...
5
votes
2answers
437 views

Yeast, CO2 Toxicity with mead and beer

Degassing CO2 during early fermentation is important for wine and mead. But why not for beer? I'm getting back into mead making and see plenty of references to degassing the must during early ...
1
vote
3answers
851 views

Wyeast Activator Swelling Expiration time

I intended on brewing tonight so I broke the activator on my Wyeast 1450 last night. Only today did I realize I'm missing a fermenting bucket to actually ferment with (d'oh, big mistake!), so I'll ...
9
votes
4answers
746 views

Harvested Yeast - What are these layers and do I have too much?

I harvested yeast a few weeks back from my hefeweizen (Wyeast 3068) which I had open fermented. To harvest, I scrapped it right off the top, after ~36 hours of fermenting, with a sanitized spoon. I ...
1
vote
3answers
2k views

Can Dried yeast function at a low temperature?

I started my first batch of home brew lager around 24hrs ago I aerarted it and it was at 20 Degrees celcius but does not appear to be fermenting..... I know people say I have to give it time as I read ...
5
votes
3answers
1k views

Wyeast 1187 Ringwood Failure

I'll start by saying that I've never used liquid yeast before, so it could all be my fault... Anyway, I ordered some Wyeast 1187 Ringwood to use for a Dogfish Head 60 Minute IPA clone that I did on ...
4
votes
2answers
392 views

Making a starter when reusing yeast

I want to reuse the washed yeast from a previous batch of beer in my next batch. Should I make a starter for it? If so, how much of it? I looked at MrMalty, and it seems to me they tell me not to make ...
0
votes
1answer
277 views

Troubleshooting a stuck fermentation with Ringwood Ale

I'm brewing an IPA using Wyeast 1187 (Ringwood Ale) and it seems stuck. I'm brewing 19L (5G) with an OG of 1.052 and pitched two (smacked) smackpacks of 1187 straight into the primary bucket. I used ...
3
votes
3answers
703 views

What is the purpose of stepping up a starter

Very simply, what is the difference in pitching 100 billion cells into a 1L starter and into a 2, 3, 4L starter of, say 1.040 OG? I understand the logic with a 5.5 gallon batch of beer: you want ...
1
vote
1answer
416 views

Are cheap poratable USB microscopes good enough to count yeast, and check vitality?

I have read that a 400x magnification is right for counting yeast on a hemocytometer, and also using dye to check vitality. I'm looking at using a cheap portable $50 USB microscope. They are rated ...
5
votes
2answers
235 views

Possible to intensify/increase the amount of yeast flavor?

I will soon be making a hefe and will be using wyeast's 3068. In recent hefes I have made, I have always desired much more intensity in the flavors provided by the yeast strain. The only method i am ...
2
votes
2answers
485 views

Top Cropping Cell Counts

TLDR: I have no idea how much top-cropped yeast to pitch into a ~1.055 OG Octoberfest (5.5 gallons) I am planning on making an Octoberfest (late I know) on August 18th. Instead of making a boring ...
3
votes
1answer
510 views

Using a low alcohol tolerance yeast in potentially high alcohol must

i have posted this question on other forums but haven't really gotten a good answer. If I am attempting to create a sweet mead and want to avoid backsweetening (lots of additional tweaking) or ...
3
votes
1answer
721 views

How much yeast nutrient does starter wort need?

I am going to make a batch of wort to be stored in 1 quart jars to make starters from. I'd like to add the yeast nutrient (diammonium phosphate and yeast hulls) at this time so I don't have to mix it ...
11
votes
5answers
5k views

What would cause yeast to fail to flocculate?

I am using WLP002 - English Ale Yeast - in my current batch, a Young's double chocolate clone. According to the manufacturer's product page, this yeast is highly flocculant. The beer remained in the ...
6
votes
2answers
599 views

Measuring yeast in a slurry

Please tell me if I'm being overly simplistic here. I was reading the book yeast by Chris White and Jamil Zainasheff. In the book, they talk about measuring how many cells are in a slurry by using a ...
4
votes
2answers
950 views

How much yeast do i need for 1bbl batches?

We are planning on brewing 1bbl batches, but we are kind of stuck on how much yeast we need. We contacted White Labs but their 1bbl pitchable yeast is way too expensive. I want to know what would be ...
5
votes
1answer
725 views

What flavors come from fermenting S-04 on the warm side?

I brewed this 1064 OG recipe and used my reverse flow chiller to get it down to 74F (could have gone cooler, but my starter was at 76F or so). It fermented like nuts (over 1.5 gallons of krausen ...
1
vote
1answer
266 views

My yeast isn't floating at the top of my mead

I just made my first ever batch of mead. I used a stronger yeast (a wine yeast) and the package said to let it sit for about 15 minutes in 50ml of warm water. I did that and added the water and yeast ...
6
votes
2answers
846 views

Storing Yeast Slurry

If I take a yeast slurry from a batch of beer, wash it and store it in a sanitized container - how long can I leave this yeast slurry in the fridge before repitching? I'm thinking of leaving it in the ...
11
votes
2answers
890 views

How do I make a Yeast Starter?

I know I should be using a Yeast Starter so that I can make sure I have enough, healthy yeast, but I've never managed to go around to it. How would I start a yeast starter? How long before brewday ...