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General Category => Yeast and Fermentation => Topic started by: davidgzach on April 17, 2012, 01:27:49 PM

Title: Starter for my Helles
Post by: davidgzach on April 17, 2012, 01:27:49 PM
I plan to repitch some 2206 that I saved from a Becks clone on 3/27 in to my Helles this weekend.  Mr. Malty says the viability is 60% so I'm wondering how big of a starter I should make.  I don't need my usual 1G monster but what is the recommendation of the forum?  I was thinking maybe a 2L at 1.038-1.040?

Dave
Title: Re: Starter for my Helles
Post by: tschmidlin on April 17, 2012, 04:01:26 PM
It totally depends on how much slurry you plan to use.  Why not use the mrmalty.com calculator and see what it says?
Title: Re: Starter for my Helles
Post by: bluesman on April 17, 2012, 04:27:58 PM
+1

You need to calculate the total number of cells needed which corresponds to a volume of slurry at a given thickness and viability.  There is a bit of estimation involved but mrmalty.com will help guide you on this.
Title: Re: Starter for my Helles
Post by: nateo on April 17, 2012, 05:24:01 PM
This might be a dumb question, but can you overpitch lagers? It seems like most people have issues underpitching lagers, but I haven't heard of problems from overpitching.
Title: Re: Starter for my Helles
Post by: davidgzach on April 17, 2012, 05:31:37 PM
+1

You need to calculate the total number of cells needed which corresponds to a volume of slurry at a given thickness and viability.  There is a bit of estimation involved but mrmalty.com will help guide you on this.

OK, so here is what I have.  I saved all the slurry from the Becks in a container.  From there I washed it several times until there was a clear separation of water, yeast and trub.  Now I just decanted the water, yeast and a little trub in a separate container.  The plan was to see how much yeast I have and make a starter from there.  If I saved all of it from my last batch and it's at 60% viability, I figure I'm either right where I need to be or should make a small starter.

Should I now just estimate how much yeast I have, figuring the yeast concentration is on the high side and the non-yeast percentage is on the low side?  Seems right but please chime in if I'm missing something.   I want to learn how to calculate this properly.  Thanks.

Ron, hook me up.  I voted for you!   ;)

Dave
Title: Re: Starter for my Helles
Post by: davidgzach on April 17, 2012, 05:32:27 PM
This might be a dumb question, but can you overpitch lagers? It seems like most people have issues underpitching lagers, but I haven't heard of problems from overpitching.

I've yet to hear of such a thing!
Title: Re: Starter for my Helles
Post by: bluesman on April 17, 2012, 06:46:59 PM
+1

You need to calculate the total number of cells needed which corresponds to a volume of slurry at a given thickness and viability.  There is a bit of estimation involved but mrmalty.com will help guide you on this.

OK, so here is what I have.  I saved all the slurry from the Becks in a container.  From there I washed it several times until there was a clear separation of water, yeast and trub.  Now I just decanted the water, yeast and a little trub in a separate container.  The plan was to see how much yeast I have and make a starter from there.  If I saved all of it from my last batch and it's at 60% viability, I figure I'm either right where I need to be or should make a small starter.

Should I now just estimate how much yeast I have, figuring the yeast concentration is on the high side and the non-yeast percentage is on the low side?  Seems right but please chime in if I'm missing something.   I want to learn how to calculate this properly.  Thanks.

Ron, hook me up.  I voted for you!   ;)

Dave

I recommend using a moderate slurry thickness and non-yeast percentage of 25%.
For a 50GU Helles use 350Billion cells or 300mL of a moderate slurry. That will be plenty.  :)
Title: Re: Starter for my Helles
Post by: davidgzach on April 17, 2012, 06:56:47 PM
Thanks man!