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General Category => Yeast and Fermentation => Topic started by: etbrew on December 13, 2014, 07:55:34 PM

Title: Reusing yeast
Post by: etbrew on December 13, 2014, 07:55:34 PM
I have reused yeast twice but because I'd like to save some money, and hate throwing away what looks like perfectly good yeast, I'd like to reuse more. I How many times do all of you reuse yeast?
Title: Re: Reusing yeast
Post by: klickitat jim on December 14, 2014, 01:42:37 AM
Indefinitely if the conditions are perfect. For a homebrewer, 3-5 generations before you notice a change. Thats been my experience anyway.
Title: Re: Reusing yeast
Post by: mainebrewer on December 14, 2014, 12:08:52 PM
I've been reusing my yeast for several years now.
My two normal yeasts are WLP001 and WLP002.
I've found that I can get 10-12 repitches from the 001 before I notice any change.
However, the 002 starts to change around pitch number 6 or 7.
While it does save some $, I do it because it gives me a ready supply of yeast.
Title: Re: Reusing yeast
Post by: Frankenbrew on December 14, 2014, 12:29:39 PM
While it does save some $, I do it because it gives me a ready supply of yeast.

+1 More than the $, it saves me a trip to the LHBS.

I regularly re-pitch all types of yeast--even yeast that started out dry. I usually stop after about 3 generations. I've never noticed any change, infection, or mutation.
Title: Re: Reusing yeast
Post by: majorvices on December 14, 2014, 02:03:07 PM
You should be able to go at least 7 generations. The key is to use it fresh, within 2 weeks of harvesting. Otherwise you should probably make a starter.

When I buy a vial or smack pack I usually start out with a schedule of what I am going to brew the next several weeks. I may start with a dunkel, then go to a bock then a doppelbock or start off with an ESB then from there go EIPA, Robust Porter and Barley wine. The key is to start lower gravity and stay the same or go up. You probably don't want to reuse yeast from SGs much higher than 1.065, maybe 1.070.

If I am really lazy I may even start with a very low gravity beer, not make a starter and just pitch 2 packs of yeast per 5 gallons and use that as a big starter for my next beer.
Title: Re: Reusing yeast
Post by: etbrew on December 14, 2014, 02:11:48 PM
Sounds like I've wasted a lot of yeast over the years...

Do you just pour the slurry into a sanitized container and store in the fridge?  How long will it be viable?  Do you wash it? 

I've been reusing my yeast for several years now.
My two normal yeasts are WLP001 and WLP002.
I've found that I can get 10-12 repitches from the 001 before I notice any change.
However, the 002 starts to change around pitch number 6 or 7.
While it does save some $, I do it because it gives me a ready supply of yeast.

When you say 001 and 002 what do you mean?
Title: Re: Reusing yeast
Post by: Frankenbrew on December 14, 2014, 03:08:50 PM
Sounds like I've wasted a lot of yeast over the years...

Do you just pour the slurry into a sanitized container and store in the fridge?  How long will it be viable?  Do you wash it? 

I've been reusing my yeast for several years now.
My two normal yeasts are WLP001 and WLP002.
I've found that I can get 10-12 repitches from the 001 before I notice any change.
However, the 002 starts to change around pitch number 6 or 7.
While it does save some $, I do it because it gives me a ready supply of yeast.

When you say 001 and 002 what do you mean?

001 and 002 are White Labs product numbers; I'm not sure, but I think 001 is Chico/Ballantine American ale yeast.

Mason jars are perfect for storing yeast in the fridge. Sanitize them first and store yeast any where from 3-6 months.
Title: Re: Reusing yeast
Post by: S. cerevisiae on December 14, 2014, 04:44:32 PM
Do you just pour the slurry into a sanitized container and store in the fridge?  How long will it be viable?  Do you wash it? 

https://www.homebrewersassociation.org/forum/index.php?topic=19850.0
Title: Re: Reusing yeast
Post by: etbrew on December 15, 2014, 02:22:13 AM
Do you just pour the slurry into a sanitized container and store in the fridge?  How long will it be viable?  Do you wash it? 

https://www.homebrewersassociation.org/forum/index.php?topic=19850.0

Thanks! 
Title: Re: Reusing yeast
Post by: bboy9000 on December 15, 2014, 04:11:32 AM

Do you just pour the slurry into a sanitized container and store in the fridge?  How long will it be viable?  Do you wash it? 

https://www.homebrewersassociation.org/forum/index.php?topic=19850.0

+1

Reading the posts from S. cerevisiae convinced me to repitch more often.