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**flars** · 03-10-2013, 09:45 PM

Quote:

Originally Posted by christpuncher123

According to mrmalty the 90ml of 60% viability is half of what I need how do I get to the 237 billion cells I need? And how the hell did the 100 billion from the original smack pack finish the original beer?

Your original beer was 1.046. With fresh yeast you normally don't need a starter until you approach 1.060. I entered this into malty: Repitching from slurry tab. 1.046 OG. 5.0 gallons. Production date 3/3/2013. Used standard settings for yeast concentration and yeast percentage. Comes up with 90ml needed.

christpuncher123 · 03-10-2013, 10:22 PM

Actually batch size is 5.5 gallon beer was done on 02/24/2013 it sat for another couple of weeks after finished. O.G. Is supposed to be. 052 I had a low boiloff that day so I only hit 1.046. So from that production date size and og I need 173ml and 237 billion cells!

**climateboy** · 03-10-2013, 11:36 PM

Ok, I'm going to make a confession here. Mr. Malty be damned. I make starters, sometimes stepping them up if the brew is big or the yeast is old and then--hit my mash targets, add yeast nutrient, aerate the wort really well, control fermentation temperatures, and...my beer turns out delicious and attenuated to expectations. Our yeast labs our great, and if your fridge keeps good temperatures, I think the yeast degradation calculus on Mr. Malty is way out of whack. I used when I first started, never since, and have never had a problem.

**flars** · 03-11-2013, 12:17 AM

Quote:

Originally Posted by christpuncher123

Actually batch size is 5.5 gallon beer was done on 02/24/2013 it sat for another couple of weeks after finished. O.G. Is supposed to be. 052 I had a low boiloff that day so I only hit 1.046. So from that production date size and og I need 173ml and 237 billion cells!

I come up with different numbers. Unless I'm missing a lot, a one liter starter should be more than sufficient for your next brew. Check out these notes for malty.
http://www.mrmalty.com/calc/repitch.html

christpuncher123 · 03-11-2013, 12:56 AM

http://www.mrmalty.com/calc/calc.html This is what I am Getting.

**flars** · 03-11-2013, 02:13 AM

Quote:

Originally Posted by christpuncher123

http://www.mrmalty.com/calc/calc.html This is what I am Getting.

I tried this to, but the link won't show your data.
You have approximately180 billion cells; 87% viability. Viable cells 156.6 billion.
You need 200 billion cells.
A 1 liter starter with intermittent shaking will give you 251 billion cells.
I estimated 2 billion cells per milliliter for fresh yeast.
I have been worrying about this also. I've just started repitching yeast.

christpuncher123 · 03-11-2013, 03:15 AM

I just Bit the bullet and spent $9 on ebay on the parts for a stir plate, LOL! It's amazing how much crap I have built for next to nothing or free for this hobby!

**Mdsutton** · 03-11-2013, 08:58 PM

OK, Give list of parts from ebay, I need to build one too!

Thanks