Author Topic: Anti foam and dry yeast  (Read 1001 times)

Offline Pi

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Anti foam and dry yeast
« on: June 19, 2015, 02:20:22 PM »
After aerating theres alot of foam on top in the carboy. If i use a couple drops of fermcap, and then pitch dry yeast on top will it effect the yeast?
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Offline toby

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Re: Anti foam and dry yeast
« Reply #1 on: June 19, 2015, 02:36:52 PM »
No, it shouldn't.  When adding to fermenter, the recommendation for Fermcap-S is 2 drops per gallon, from my recollection.  Personally, I always add it to the boil to prevent boil-overs (3 drops per gallon) which also takes care of fermentation.

Offline 69franx

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Re: Anti foam and dry yeast
« Reply #2 on: June 19, 2015, 03:06:32 PM »
+1, That's how I use it too Toby,  when I use it. My larger BK has allowed me to limit my use since last fall
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Offline Pi

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Re: Anti foam and dry yeast
« Reply #3 on: June 19, 2015, 03:32:30 PM »
I already added (just 3 drops of 5 Star Defoamer 10) to my boil, which worked fine, but now when i aerated in the carboy its foaming back up. I would think that if it stays on top of the wort in the BK it would NOT transfer to the fermenter since i never draw that far down.
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Re: Anti foam and dry yeast
« Reply #4 on: June 19, 2015, 03:53:12 PM »
It doesn't stay on top of the wort.  It 'mixes' into it.  Foam is basically bubbles forming groups and merging and expanding.  Anti-foaming agents just help to keep them from binding together.

Offline duboman

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Re: Anti foam and dry yeast
« Reply #5 on: June 19, 2015, 09:17:25 PM »
I would recommend taking the little extra time to properly re-hydrate your dry yeast and then pour the slurry in, the foam won't be an issue then:)
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Offline euge

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Re: Anti foam and dry yeast
« Reply #6 on: June 20, 2015, 11:02:33 AM »
I have the 5-star.

You have to add it to the fermenter when the krausen is up not before. As with the boil it only works and prevents once the foam has started rise.

I'm assuming Fermcap works the same way.
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Re: Anti foam and dry yeast
« Reply #7 on: June 20, 2015, 04:49:38 PM »
I would recommend taking the little extra time to properly re-hydrate your dry yeast and then pour the slurry in, the foam won't be an issue then:)

Testing has shown no advantage to rehydrating in terms of performance.  Yes, you may end up with more viable cells, but it doesn't appear to matter to the quality of the beer.
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Offline duboman

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Re: Anti foam and dry yeast
« Reply #8 on: June 20, 2015, 06:31:05 PM »
I would recommend taking the little extra time to properly re-hydrate your dry yeast and then pour the slurry in, the foam won't be an issue then:)

Testing has shown no advantage to rehydrating in terms of performance.  Yes, you may end up with more viable cells, but it doesn't appear to matter to the quality of the beer.
I've read the same but IME I've achieved better results rehydrating and it eliminates the problem the OP questioned at the same time:)
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Re: Anti foam and dry yeast
« Reply #9 on: June 21, 2015, 04:32:52 PM »
I would recommend taking the little extra time to properly re-hydrate your dry yeast and then pour the slurry in, the foam won't be an issue then:)

Testing has shown no advantage to rehydrating in terms of performance.  Yes, you may end up with more viable cells, but it doesn't appear to matter to the quality of the beer.
I've read the same but IME I've achieved better results rehydrating and it eliminates the problem the OP questioned at the same time:)

Then obviously you should keep doing what you're doing!  I've found absolutely no difference in the quality of the finished beer.
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Offline johnnyb

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Re: Anti foam and dry yeast
« Reply #10 on: June 21, 2015, 04:40:57 PM »
Question for the folks who don't rehydrate: Are you still using one package or do you use two? (Let's say for something around SG of 1.055 or so.)

I've fermented US-05 without rehydrating with good results, but I've always bumped up to two packages. Haven't tried it with only 1.

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Re: Anti foam and dry yeast
« Reply #11 on: June 21, 2015, 07:04:12 PM »
Question for the folks who don't rehydrate: Are you still using one package or do you use two? (Let's say for something around SG of 1.055 or so.)

I've fermented US-05 without rehydrating with good results, but I've always bumped up to two packages. Haven't tried it with only 1.

One pack unrehydrated up to about 1.070
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Offline johnnyb

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Re: Anti foam and dry yeast
« Reply #12 on: June 21, 2015, 10:09:06 PM »
Question for the folks who don't rehydrate: Are you still using one package or do you use two? (Let's say for something around SG of 1.055 or so.)

I've fermented US-05 without rehydrating with good results, but I've always bumped up to two packages. Haven't tried it with only 1.

One pack unrehydrated up to about 1.070

Nice, that will save a few bucks.

Do you aerate the wort when pitching US-05?

Offline duboman

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Re: Anti foam and dry yeast
« Reply #13 on: June 22, 2015, 02:25:10 PM »
Question for the folks who don't rehydrate: Are you still using one package or do you use two? (Let's say for something around SG of 1.055 or so.)

I've fermented US-05 without rehydrating with good results, but I've always bumped up to two packages. Haven't tried it with only 1.

One pack unrehydrated up to about 1.070

Nice, that will save a few bucks.

Do you aerate the wort when pitching US-05?
Yes, yeast require O2 through the growth phase
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Re: Anti foam and dry yeast
« Reply #14 on: June 22, 2015, 03:34:12 PM »
Nice, that will save a few bucks.

Do you aerate the wort when pitching US-05?

Sometimes yes, sometimes no.  Doesn't seem to matter.
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