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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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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4answers
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Can a little human spit spoil fermented beer?

The other day, I was with my friend getting ready to bottle a batch of modified cream ale (our second homebrew so far). We were using an auto-siphon to transfer beer from fermenter to the bottling ...
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1answer
720 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
3k views

How to identify a brett contamination

I brewed a single hop American pale ale with palisade. It's not the greatest beer in the world, but seemed passable to me. Another brewer tasted it and thought he picked up brett in it. Palmer says:...
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1answer
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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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3answers
699 views

cleaning vs. sanitizing

I have made over 50 batches of homebrew, and I have a confession: I rarely CLEAN my equipment. I take a quick look to see if there is any visible debris/dust, etc., and if so, I will spot clean it or ...
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2answers
250 views

New brewer, question about state of beer prior to bottling

Tomorrow is the Big Bottling Day. I snuck a peek about a week ago and took a hydro reading, and all is well I believe. I took another peek today (14 days in) just to make sure I'm not about to bottle ...
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1answer
489 views

contamination? what's this?

I brewed a hoppy red ale on Tuesday and pitched some washed wyeast 1084 into it that evening. I had an og of 1.070 and went ahead and put a blowoff tube on the fermenting bucket in case I had a huge ...
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6answers
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Can Infected beer cause death or major illness?

Basic question. Can you get sick and die from drinking infected brew? I know that it must taste terrible, was just wondering. Can't seem to find any references where people have died from infected ...
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2answers
261 views

Mold on wort pre-pitch

I've got a bit of mold on top of my wort. My situation is a bit different than what others seem to have encountered... I made the wort about 5 days ago and hadn't gotten around to pitching the yeast....
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2answers
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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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1answer
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Possibly infected mead: is it worth keeping?

I tried making cherry mead again (the first time I tried this it got infected). I tried again yesterday, and it looks like I've got some sort of contamination ("infection"). This time I thought that ...
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Cherry vinegar (was supposed to be mead)

Last week I started a cherry mead and discovered yesterday that it had turned to vinegar (and not even nice-tasting cherry-flavoured vinegar - it smelled and tasted awful, though the colour was great)....
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4answers
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Can a contaminted brew be identified by sight?

I brew ten-gallon batches of beer split into two fermentors. The last batch that I kegged had one infected fermentor, while one remained uninfected. One bucket showed a white powdery substance ...
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5answers
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What prevents contamination during primary fermentation?

I'm about to start my first beer and I've been doing lots of research.. but a question I haven't seen answered is why isn't there more contamination during primary fermentation. For secondary the ...
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4answers
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What is this white stuff on the surface of my beer?

I've just gone to rack & bottle a witbier that has been in primary for about 5 weeks and noticed this white gunk floating on top of the beer. It doesn't look too healthy, what is it? Is it safe? ...
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3answers
676 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
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Lacto contamination in plastic fermenter = new fermenter?

Just bottled my first contaminated beer, got lazy and didn't freeze/boil the watermelon I added to a wheat beer and got lacto(?) contamination and an amazing sour watermelon beer as a result! But, ...
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1answer
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What is the white film on my beer in my bottles?

I brewed a double batch of IPA with a buddy about 8 weeks ago. We split this into two 5 gallon pails and 2 weeks later into two carboys. His was fine, but mine developed a bit of white stuff on ...
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5answers
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What kind of infection is this and is the beer ruined?

Picture of Infection This is my first all-grain batch and unfortunately it has developed some kind of growth. It didn't smell like death, actually smelled pretty good, and the samples I have been ...
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4answers
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How to add adjuncts (hops, fruit, spices, etc) to the fermenter without contaminating the beer?

What is the best way to sterilize things like dry hops, spices or fruit before putting them in the fermenter? Some stuff you can obviously boil. But boiling hops, say, would defeat the purpose of ...
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3answers
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Consequences of infection in a beer?

Everyone learns during their first brewing experience that you have to carefully sanitize anything that touches your wort after the boil to avoid infection. What happens when wort gets infected? How ...
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5answers
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Help! My secondary fermenter exploded!

So, I was brewing a nice IPA the other day. I walked in to check on the carboy and the stopper had popped out and there were hops everywhere! I stopped it back up and bottled it a few days later ...
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5answers
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What is on top of my wort? Mold? Lacto?

I just opened the top of my scotch ale bucket, and it looks like there's mold inside. The recipe is pretty standard, plus some oak chips soaked in whiskey, in a muslin bag. What is this? Edit: Some ...
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3answers
253 views

What about opened LME cans?

Most LME come in 3 pound cans, which is a quite large quantity if you want to add just a little to your wort, just one pound for example. It's a shame to throw away the rest. If I open a LME can and ...
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10answers
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Spigots: What's the consensus

I like to use an ale pail with a spigot for my secondary. It makes it super easy to test the gravity before actually bottling/kegging/etc. However, that sort of installation in plastic can open the ...