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

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How long should I expect to wait before seeing activity in my yeast starter?

I usually see activity in my yeast starters in the first twelve hours after pitching the yeast. This time, however, I haven't seen anything for 48 hours. No bubbling, no signs of floating yeast and it ...
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Cider - Yeast doesn't seem to kick off

I have 2 x 23L carbouy's full of freshly pressed juice, ready for fermentation. I began the process by killing off all the wild yeast strains in the apples by adding 1 1/4 teaspoons of sodium ...
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47 views

Ale yeast re pitch

Okay so I racked this experiment into a 6 gallon glass, slowly brought it up to 68F and re pitched with Safale05. After 24 hours, there is very little activity. One bubble every minute. Is it ...
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137 views

Ale yeast at cold temps?

I made a modified Oktoberfest 11 days ago. I used an ale yeast to cut down on the time. I let it ferment at 68 degrees Fahrenheit for 4 days, then decided to put it in the fridge at 50 degrees. I ...
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264 views

I am brewing alcoholic ginger beer. How much sugar to prime it?

I am looking for this ginger beer to be sweet, spicy and very fizzy. Something which should violate your tongue's human rights. I have never produced a fizzy brew before so know nothing about ...
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81 views

Temperature when hydrating dry yeast

Some Lalvin yeast I bought is not doing anything in my wort. When I told people on an online forum I'd hydrated it with 40 degrees C water, they told me this was far too hot. But this is exactly what ...
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201 views

What type of yeast to use for a low ABV mead?

I'm looking to experiment making a low-alcohol mead (i.e. under 8% ABV). In terms of buying a sachet of yeast I can see standard beer/cider/wine variants and obviously for brewing there are loads of ...
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no brew shop here. use some warm beer as yeast?

it is hard to find beer yeast where I live. I was wondering if it is possible to just buy a bottle of good beer and use as yeast after bringing it to 25C temperature
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Imperial Stout with not enough yeast

I'm working on brewing an Imperial Stout and using a liquid yeast (WLP-007). Beer Smith is telling me that I need about 300bn yeast cells. However, it says I might get 180bn. I'm usually not a ...
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95 views

Which is a better fermentation method for high gravity beers?

I'm looking to brew a high gravity porter for christmas this year, aiming for OG 1.100. I've browsed several questions on this site relating to high gravity beers and the tendency seems to be towards ...
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Fast Fermentation - Should I be worried?

Just did my first batch using the fast ferment conical fermenter. Brewed an extract kit from Northern Brewer....their Smashing Pumpkin Ale. It's a 1.054 OG brew and I used a dry yeast to ferment. ...
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Yeast plate not showing single colonies

Why do my yeast plates end up looking like this? And not this? My yeast plate is composed of wort + agar.
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Maximizing fruitiness from WLP002

I am looking to reproduce an incredible fruity aroma and flavour from a recipe I made a year ago. Looking at the recipe I am guessing it may be from the yeast. 3lb 2row 1lb Rye .13oz nugget @ 60 min ...
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Krausening / Pitching Actively-Fermenting Wort

I heard on one of the old Jamil shows that pitching actively-fermenting starter is a good way to get noticeable but subtle yeast character in a beer. You need to start with an adequate amount of ...
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Homebrewing Soda, Safety Concerns

I wanted to try making my own soda this summer, and finally got around to it 10 days ago. Here's the thing. I didn't have/use any specialized equipment. I boiled water with sugar ~15 minutes, and ...
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62 views

Preparing yeast for secondary fermentation

I have a barleywine in progress that seems to have stalled around 9% ABV with some residual sweetness I'd like to try and reduce. After 2.5 weeks in primary all activity had stopped so I racked off ...
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Yeast Problems!

Brewing a porter, pitched my yeast and started with a 1.056. My air conditioner broke for 1 day and the beer got to about 80 degrees after about 1 1/2 weeks of fermentation. Beer has been sitting at ...
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Worried about extent of inflation of Wyeast 4766 package

My friend and I were trying to ferment some raspberries using the WYEAST 4766 Cider yeast. Now it's 1 day after we activated the package and it is still only partially inflated. Should we buy a new ...
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157 views

Kegging - Is it necessary to filter yeast?

I'm planning to buy kegging equipment and keg my next batch of beer, and I ran into some yeast filters for sale that remove yeast specifically for kegging. Is this a necessary step? I know that when I ...
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Coud I ferment a five gallon batch on top of the yeast cake from a finished one gallon batch?

Title says it all: Could I ferment a five gallon batch on top of the yeast cake from a finished one gallon batch?
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If oxygen is important mostly during the lag phase why not pre-oxygenate the yeast pitch prior to inoculation?

I feel that this question could potentially have more specific and direct sub questions but for now I would like to simply pose it as "why not oxygenate active yeast prior to pitching instead of ...
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Is my frozen yeast okay?

So I harvested my yeast for the first time (WLP566 Saison II), but I left the fridge temp mega low by mistake and it froze overnight. I have immediately thawed it out, but I am wondering if it now ...
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Why should I make a starter? [duplicate]

Why should I make a yeast starter and not just sprinkle the yeast on top of the wort like the packet says? I am sure there must be some good reason why you would do this.
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Is this pediococcus contamination('infection')?

A berliner weisse we forgot to bottle for around a month and a half. Did not introduce pediococcus or lactic acid in the fermentation. Did a sour mash before the boil so lactobacillus shouldn't have ...
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What is the approximate batch size/OG limit for US-05 11g packet? Have I used enough?

I've started a brew with an OG of 1.065 in a 23L batch. I pitched a rehydrated 11g pack of US-05 and after 5 days I took a FG reading when I observed no bubbles after some time; it came out at 1.028 - ...
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Is oxygenating after brew day okay?

If you don't oxygenate on brew day, is it too late or can you oxygenate late? If so, are there limits?
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Lightening of Cider

My peach-apple oxidized a bit as I was juicing and started fermentation amber-brown. Over two days of rapid fermentation with Safale US-O5 dry ale yeast, the color lightened to a pale yellow, straw ...
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How to fix yeast smell in young wine from kit

I started my first attempt at fermenting this wine kit in mid-April. I followed the initial directions pretty meticulously which included stirring in the fermentation bucket daily (due to kit ...
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Handling dried yeast

I'm brewing a coopers ginger beer kit but over the past week the yeast didn't seem to activate particularly well. There has been no krausen and over the past couple of days there have been a few ...
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118 views

Does yeast type affect wine taste..?

I'm new in wine making and I tried to make it with fresh yeast, not dried. I think I'm using a lot of it to help fermentation end faster. Will this affect the taste of wine? Will dries yeast achieve a ...
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Heating after fermentation?

What's the general consensus on leaving a heat source turned on after fermentation has complete? I'm doing an Imperial IPA which should finish fermenting in 4-5 days going by previous experience with ...