### Author Topic: Will pitching entire package into 1/2 batch compensate for mishandling?  (Read 3123 times)

#### a10t2

• Official Poobah of No Life.
• Posts: 4248
• Ask me why I don't like Chico!
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #15 on: November 08, 2012, 01:40:45 PM »
Just wondering.  I use Mr.Malty and/or Yeastcalc for these type questions and both have a 10% viability at 5 months.  Where does the 25%/month rule of thumb come from?

The MrMalty calculator assumes that viability drops linearly from 100% to 10% over a period of ~3.5 months, then stays at 10%. Which is obviously a very artificial-looking curve, but probably close enough not to cause any problems until you get to very old samples.

Who originated the 25%/month rule, I don't know, but it does track well with cell counts I've done on stored slurry.
Sent from my Microsoft Bob

Beer is like porn. You can buy it, but it's more fun to make your own.
seanterrill.com/category/brewing | twomilebrewing.com

#### davidgzach

• Senior Brewmaster
• Posts: 1690
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #16 on: November 08, 2012, 01:59:27 PM »
Just wondering.  I use Mr.Malty and/or Yeastcalc for these type questions and both have a 10% viability at 5 months.  Where does the 25%/month rule of thumb come from?

The MrMalty calculator assumes that viability drops linearly from 100% to 10% over a period of ~3.5 months, then stays at 10%. Which is obviously a very artificial-looking curve, but probably close enough not to cause any problems until you get to very old samples.

Who originated the 25%/month rule, I don't know, but it does track well with cell counts I've done on stored slurry.

I've always wondered about that and the 25%/month curve would make more logical sense.
Dave Zach

#### tschmidlin

• I must live here
• Posts: 8198
• Redmond, WA
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #17 on: November 08, 2012, 11:57:22 PM »
(NOTE: My work computer does not have spell check in IE. I apologize for my abismal spelling)
Abysmal.
Tom Schmidlin

#### davidgzach

• Senior Brewmaster
• Posts: 1690
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #18 on: November 09, 2012, 05:25:34 AM »
(NOTE: My work computer does not have spell check in IE. I apologize for my abismal spelling)
Abysmal.

LOL, nice Tom!
Dave Zach

#### euge

• I must live here
• Posts: 8022
• Ego ceruisam ad bibere cervisiam
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #19 on: November 09, 2012, 06:14:34 AM »
(NOTE: My work computer does not have spell check in IE. I apologize for my abismal spelling)
Abysmal.

LOL, nice Tom!

Ever heard of Firefox Mort?
The first principle is that you must not fool yourself, and you are the easiest person to fool. -Richard P. Feynman

Laws are spider-webs, which catch the little flies, but cannot hold the big ones. -Anacharsis

#### morticaixavier

• I must live here
• Posts: 7780
• Underhill VT
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #20 on: November 09, 2012, 07:47:04 AM »
(NOTE: My work computer does not have spell check in IE. I apologize for my abismal spelling)
Abysmal.

LOL, nice Tom!

Ever heard of Firefox Mort?

Sure, I actually use chrome at home (ha that rhymes) but the work machine is IE whether I like it or not. If I really cared I could always pull the posts over to Word to spell check but it ain't no big thang
"Creativity is the residue of wasted time"
-A Einstein

"errors are [...] the portals of discovery"
- J Joyce

#### a10t2

• Official Poobah of No Life.
• Posts: 4248
• Ask me why I don't like Chico!
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #21 on: November 09, 2012, 09:11:26 AM »
If I really cared I could always pull the posts over to Word to spell check but it ain't no big thang

Thing.
Sent from my Microsoft Bob

Beer is like porn. You can buy it, but it's more fun to make your own.
seanterrill.com/category/brewing | twomilebrewing.com

#### weithman5

• Senior Brewmaster
• Posts: 1681
• naperville, il
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #22 on: November 09, 2012, 09:18:13 AM »
if you guys don't twit it I will tate my ball and do stwaight home.
Don AHA member

#### tschmidlin

• I must live here
• Posts: 8198
• Redmond, WA
##### Re: Will pitching entire package into 1/2 batch compensate for mishandling?
« Reply #23 on: November 10, 2012, 12:41:21 AM »
If I really cared I could always pull the posts over to Word to spell check but it ain't no big thang

Thing.
I was thinking the same thing, the scrolled down a little further.
Tom Schmidlin