The introduction of unwanted organisms or chemicals into the beer. Typically, this refers to unwanted bacteria or wild yeast propagating to levels to cause spoilage of the beer. Often incorrectly called an "infection".

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672 views

wild yeast taking over?

I brewed a belgian triple last week. I had a starter going using white labs trapist yeast but it didn't take off, must have been a bad vial. In the meantime the batch was sitting in the carboy ...
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3answers
145 views

How (and how soon) can I determine if my primary is contaminated?

My brew day ran long and by the end of the process I was tired and ready to be done. Due to this lapse in concentration I had a major failure in my sanitation process - I forgot to sanitize my better ...
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1answer
850 views

First Brew: Yellow Mold - Transfer to Carboy - Slowing of Fermentation

I brewed a batch of Pale (first solo brew) and after pitching yeast (6 hours), noticed yellow clusters of what I think was mold. I thought I had an infection, so I siphoned off, and collected ...
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1answer
51 views

Wort Contamination?

Making my first beer and during my last temp check I dropped the thermometer into my wort bucket, instinctively i immediately reached in and pulled it out. My hands were cleaned and sanitized and my ...
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1answer
63 views

Has My mead gone south?

This is rather my first time doing a mead. It has been a month since i put it up for fermentation. Its been locked in a relatively stable temperature and totally dark enviroment. Today, after a full ...
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5answers
143 views

trying to ID if my beer was infected!

My brown ale smelt somewhat like beer and possibly vinegar and tasted the same but with a very subtle sweetness but also very dry and puckering. I used only used dry extract and boiled the hops, no ...
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1answer
2k views

Is this lactobacillus?

My last batch had a thin whitish 'membrane' on top of it and some white spots, visible on the picture bellow. I think I saw something similar on a blog a while ago, attributed to a lactobacilus ...
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1answer
1k views

Is iodophor ideal for rinse-less sanitization before bottling?

I was talking to a friend today and complainIng about the clean/bleach/sanitize/rinse process I undergo when bottling. He dug a bottle of iodophor out of a back shelf and asked me to try it out. He ...
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1answer
118 views

Possible wild yeast contamination?

In May I brewed the following beer: 81% Pale 2 row malt 16% Brown malt 3% Black malt Single step mash at 73C. With 290g of hops for a total of 103 IBUs. The OG was 1.077 and it went into primary ...
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4answers
842 views

Overcarbed or gusher contamination('infection')?

Is there an easy way to detect whether excessive foaming / gushing is the result of over carbonation or a gusher contamination? Perhaps a telltale taste or other indicator?
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3answers
242 views

Fermentation - Lost cause?

I believe my first homebrew is a lost cause. I'm at 3 weeks, and each week I've done a gravity reading and a taste. The flavor has gotten increasingly sour(astringent) with each week. It's almost ...
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1answer
255 views

Mead has infection/discoloration

I brewed a sweet mead on February 24th, 2013, racked it to secondary on April 4th, 2013, and was getting ready to bottle it now (end of July). I had been out of town for a few weeks and when I came ...
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1answer
30 views

Can I deal with diluted amounts of preservatives and still get good hard cider?

On a whim I decided to throw some Cider in a bucket, so I went to the store and grabbed some. I took a chance and bought 2/3 no preservatives and 1/3 preservative (4.5 Gallons total) in order to ...
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2answers
497 views

Test for Acetobacter in Cider

I started my first cider yesterday. I am concerned that, because I haven't pasteurised I am running the risk of getting 12 litres of vinegar. Is there I anything I can do, now fermentation has ...
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3answers
224 views

How worried should I be about a plastic-wrapped kettle that had to air chill for two days?

I was in the middle of a 7-gallon brew, when my landlord informed me that the grain that I had put down my garbage disposal had clogged the main drain for the house. My sink is too small for an ice ...
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2answers
2k views

Ways of saving an band-aid beer

I am exploring what in my process could have possibly caused this flaw, but it is likely old yeast propogated in a starter and then pitched, as this has not happened to me ever before. What I am ...
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1answer
75 views

I can't differentiate between OCD or the smell of vinegar, and need some guidance

Here's my brief story: Bought a Mr. Beer kit and didn't have a clue what I was doing, and out of impatience would squeeze the fermentor to smell the brew, resulting in an infection. I now have cheap, ...
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2answers
371 views

Overflowing Airlock and Contamination

I use a Raspberry Pi with water-proof temperature probes to monitor the temperature of my fermenting wort, and I feed the probe through the airlock to make direct contact with the wort. Two out of my ...
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2answers
1k views

Possible contamination / small areas of bubble clusters on top of brew

How would you know if your brew is or isn't contaminated? I'm the first timer that dealt with the broken spigot & had to transfer at 6 days. Just hearing about contaminated home brew so many times ...
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1answer
672 views

Slight fizz in beer after 6 days in the fermenter - game over?

I put a batch on last Sunday, started off with a crazy high reading on the hydrometer (around 1080 when I was expecting 1040ish according to the kit) - though I suspect that was because I drew a ...
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1answer
58 views

Why is my pre yeast pitch lager bubbling in the fridge?

I have been placing my lager wort in the fridge overnight to get down to my desired pitch temp. This time I opened the fridge to see my airlock bubbling... I understand about possibility of ...
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1answer
2k views

There is a white film on the top of my bottled beer, what is it?

We brewed beer (Double IPA) for the first time, and we bottled the beer 1 week ago. Now when I look at all my bottles, they all have that white film on the top and I was wondering what it could be? ...
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3answers
529 views

Should I dump a batch with rubber smell?

I have in bottles a batch smelling like chemicals or rubber. I'm thinking keep it a while, and check if the smell fade out. Is this possible? Or I'm just wasting my time with this batch? As side ...