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Old 04-14-2013, 03:50 PM   #1
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Default What is film yeast?

I was looking on a Google cider forum and a guy said to another guy "it will be okay if you don't have film yeast starting"...?
Can someone tell me what filmic yeast is?

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Old 04-14-2013, 04:19 PM   #2
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I believe it means yeast that is near the top of the must/whatever
I think he means is it okay if I don't see any active yeast starting because active yeast stays close to the top
http://en.wikipedia.org/wiki/Flor

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Old 04-15-2013, 12:30 AM   #3
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Film yeast is yeast that grows on the surface of cider. It isn't like normal yeast because it needs oxygen, that's why it stays on the surface. It is the floating whitish stuff. Small amounts aren't really a problem except they look terrible. If you have a floating film of yeast or bacteria on your cider it means air is getting in, so you are probably doing something wrong like a bad seal. If you use a carboy filled near the top there isn't much space for a film. If you bottle still cider and air gets in you may get a bit of film yeast, makes the cider unsaleable but if it is just homebrew it is more of an embarrassment than anything else.
If you do things right film yeast is just something you read about on forums.

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Old 04-16-2013, 03:30 PM   #4
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Quote:
Originally Posted by gregbathurst
Film yeast is yeast that grows on the surface of cider. It isn't like normal yeast because it needs oxygen, that's why it stays on the surface. It is the floating whitish stuff. Small amounts aren't really a problem except they look terrible. If you have a floating film of yeast or bacteria on your cider it means air is getting in, so you are probably doing something wrong like a bad seal. If you use a carboy filled near the top there isn't much space for a film. If you bottle still cider and air gets in you may get a bit of film yeast, makes the cider unsaleable but if it is just homebrew it is more of an embarrassment than anything else.
If you do things right film yeast is just something you read about on forums.
On every batch that I have done I have about a quarter to half inch of bubbling foam on the surface of the juice in my carboy? I'm going to assume this is different from film yeast? Is that correct? It almost looks like a foam head on a beer....
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Old 04-16-2013, 05:21 PM   #5
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Quote:
Originally Posted by BadgerBrigade View Post

On every batch that I have done I have about a quarter to half inch of bubbling foam on the surface of the juice in my carboy? I'm going to assume this is different from film yeast? Is that correct? It almost looks like a foam head on a beer....
That just looks like normal fermentation to me Badger. You're good to go!
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Old 04-16-2013, 09:32 PM   #6
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You don't get film yeast in the first few days of fermentation when the cider is producing lots of co2. Mainly film yeast occurs after fermentation, during ageing. It is a very thin film (at first). Using campden tablets (SO2) helps protect against film yeast if added after primary has finished, but you still need to keep air out.

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Old 04-26-2013, 11:09 AM   #7
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so i just bottled today and after i opened my aging cider it had a thin layer of what i think was film yeast. it was white and very thin. i simply skimed it off. i then added ajc to bump up enough to carbonate. will my cider be ruined? or will it be ok since i removed it?
i was thinking i could pasteurize after it carbed up even tho it will carb to dry. good idea?

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Old 04-26-2013, 11:32 AM   #8
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i should also add it tasted fine, no sourness or anything. will the co2 from carbing inhibit its growth?

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Old 04-26-2013, 11:35 AM   #9
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I had some film yeast a couple of years ago because I had too much head space on the carboy after primary. I racked it out from underneath the film, gently sulfited, and bottled normally. It tasted great. Here is the thread with pictures...

http://www.homebrewtalk.com/f32/not-...at-but-220336/

BTW, have not had it since because I fill the carboys to the neck to keep the Oxygen out when aging.

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