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General Category => Yeast and Fermentation => Topic started by: skyler on January 15, 2010, 12:18:34 AM

Title: How long to store slurry?
Post by: skyler on January 15, 2010, 12:18:34 AM
How long is too long to store slurry in the fridge before it can be re-used. I have about a quart each of WY 1450, WY 1007, and WLP037. Each are at least 2 months old. They are stored in ziploc-brand plastic jars (with screw-on caps). Assuming I make a starter, should I be ok?
Title: Re: How long to store slurry?
Post by: BrewArk on January 15, 2010, 12:20:17 AM
If it is the color of peanut butter, I'd pitch it.  For yeast you don't want to be PC - you want as white as possible.
Title: Re: How long to store slurry?
Post by: denny on January 15, 2010, 05:07:49 PM
I've kept and successfully reused yeast as old as 5 months.  I don't necessarily recommend that, but it worked for me.
Title: Re: How long to store slurry?
Post by: bluesman on January 15, 2010, 05:37:37 PM
I've made beer from yeast cake slurry that was over 6 months old, but I made a starter from it. The nose knows. If it smells good and appears to be good (no mold) chances are it is good, but I would certainly make a starter from a yeast cake over 6 months old. Not to say you can't do it because I'm sure it can be done , but I would be concerned about the yeasts viability.
Title: Re: How long to store slurry?
Post by: blatz on January 15, 2010, 05:52:34 PM
If it is the color of peanut butter, I'd pitch it. 

you do mean dump/toss it, not 'pitch' it, right?
Title: Re: How long to store slurry?
Post by: BrewArk on January 15, 2010, 06:02:24 PM
If it is the color of peanut butter, I'd pitch it. 

you do mean dump/toss it, not 'pitch' it, right?
Bad choice of words, yes, dump it.
Title: Re: How long to store slurry?
Post by: hankus on January 16, 2010, 03:41:20 AM
I use slurry directly up to 14 days and up to 6 mnths via a starter..never tried > 6 mnths so I don't know whether it's possible later