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

learn more… | top users | synonyms

3
votes
1answer
930 views

stepping up a yeast starter

I followed the instructions in Palmer's "How To Brew" (along with some modifications from a Jamil interview that I heard), for getting a yeast starter going. It is now sitting on my stir-plate, with a ...
10
votes
3answers
342 views

Is aeration necessary if you overpitch?

We all know that aeration is necessary for yeast growth. Does it facilitate more than that? If you massively overpitch, on a previous yeast-cake for example, do you need the same amount of dissolved ...
7
votes
3answers
3k views

Why is it bad to pitch too little yeast?

What are the effects of underpitching your beer? We have an answer for over pitching, I think we need the complete set.
11
votes
1answer
4k views

Why is it bad to pitch too much yeast?

What are the effects of over-pitching? Where is the line for, say, a 1.050 beer? There is also a question for to under-pitching.
5
votes
1answer
622 views

Fermenter Heating Belt

Is it worth using? I was thinking of getting one to use on my first fermenter for a german weissbier so that the yeast flavour and aroma is more present in the final result. By how many degrees does ...
4
votes
2answers
2k views

WLP001 v. WLP051

WhiteLabs provides these two great American Ale yeast strains (among others). WLP051 (California Ale V yeast) and WLP001 (California Ale Yeast) What are the differences in these two strains and what ...
11
votes
2answers
407 views

What is attentuation?

What is attentuation? How does it effect beer flavor and quality? How is is calculated and why do I need to know it?
6
votes
2answers
823 views

Yeast starter temperatures

What temp guidlines apply to doing a yeast starter? Should the starter be at the intended fermentation temp? Should it be higher for good growth/activity? Should it be lower to keep it clean ...
3
votes
5answers
2k views

Using champagne yeast

I would like to make an IPA that is very bubbly and dry like a champagne. I'm assuming to get it really bubbly I would just bottle with champagne yeast, but to achieve the dryness would I also ferment ...
6
votes
2answers
412 views

Is my yeast dead?

I'm in the middle of bottling my stout right now. The OG was 1.070, and the gravity almost a month ago (11/24) was 1.024. I added 3/4 cup priming sugar in about 3 cups of water, and bottled about 20 ...
7
votes
3answers
520 views

How do you choose a yeast?

What characteristics do you look for in a yeast to pair with your recipe? Is there a common reference?