Spilled some yeast...

[MikeyClem]

Hi all,

I brewed my second batch today. It was an extract based black IPA from Northern Brewer. While we were pitching the yeast (one 11.5 g packet ofSafale US-05) a bit spilled and didn't make it into the fermenter. It wasn't a lot, but obviously I'm not sure how much did and didn't go in. The pitching temp was around 67 deg or so (which I think was about right) and it was a 5 gallon batch. OG was 1.074...

How will I know if I need to re-pitch?

Thanks,

Mike

 

[jammin]

With that OG, I would add more yeast. Problem is, if you don't have it on hand, it might be a mute point.

In hindsight, you probably should have had 2 packs planned out. Brew and learn

 

[MikeyClem]

Thanks... We just started fermentation tonight around 5:30... When's the latest it would be worth pitching some more yeast? I may be able to get an open store tomorrow, if not it'll be Wednesday (2.5-3 days after first pitch)

 

[diS]

Forget it now.
You would know if you spilled large amount of yeast. They will probably be covered with ones that ended in fermenter.
Also, yeast will reproduce more in under-pitching conditions so there shouldn't be great effect to fermentation.. assuming that you didn't spilled half of it..

Relax and grab a beer.

 

[WoodlandBrew]

It sounds like you didn't under pitch by much, so don't worry about it. It might have been a little better with the correct pitch rates, but your beer will be fine. It just might have been better.

Under pitching leads to more cell division. But too many cell divisions are what add off flavors, such as diacetyl

http://en.wikipedia.org/wiki/Diacetyl
http://www.wyeastlab.com/com-pitch-rates.cfm

On a slightly related note:
The other day I did a cell count on an 11.5g package of US-05 yeast and the viability was lower than I expected, even giving ample time for the yeast to rehydrate. There were about 80 billion viable cells of about 300 billion total cells.

 

[diS]

On a slightly related note:
The other day I did a cell count on an 11.5g package of US-05 yeast and the viability was lower than I expected, even giving ample time for the yeast to rehydrate. There were about 80 billion viable cells of about 300 billion total cells.

I heard this before, actually there was article on some blog about it..

Seems that this practice continues, I'd like to hear about liquid yeast viability.

 

[WoodlandBrew]

I heard this before, actually there was article on some blog about it..

Seems that this practice continues, I'd like to hear about liquid yeast viability.

Here are some cell counts I have done recently:

Number   Strain                      Viable cell count   Viability
WLP650   Brettanomyces Bruxellensis  102 billion         64%
WLP862   Cry Havoc                   93 billion          98%  
US-05    American Ale                77 billion          30%

 

[diS]

Nice.
I see there are some great info's on your blog, I have to take a time a go trough it.

 

[WoodlandBrew]

Nice.
I see there are some great info's on your blog, I have to take a time a go trough it.

Thanks! There is a new posts every other day.