Mr. Malty calculator question - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Mr. Malty calculator question

Reply
 
Thread Tools
Old 09-12-2010, 12:27 PM   #1
GRHunter
 
GRHunter's Avatar
Recipes 
 
Jan 2010
Michigan
Posts: 564
Liked 12 Times on 12 Posts



I bought a 2000ml flask and a stir plate so that I can make yeast starters for my beer. Although I have been happy with my beers so far I have been apparently under pitching my yeast, in the case of my currently planned brew by a factor of 2/3. Incredibly, making starters has been the hardest technique I have tried to learn since I started brewing. I tend to over complicate things and it appears that yeast starters are no exception. So I went to the Mr. Malty site, punched in my information, and then realized I don't really understand what it is telling me. It shows four results, two of which I need some help with.

# Yeast cells needed - I understand this one, at least in theory. Obviously I can't get out a microscope and start counting yeast cells. But if I know how many cells the yeast manufacturer says I have to start out with, I can then calculate how many more I will need.

# Vials or packs without starter - I use a starter so I can ignore this data.

# Vials or packs with starter - My results say 2. Here's where the confusion starts. I thought the whole idea of a starter was to grow enough yeast from a single tube to give you the proper number of cells to pitch with. Is there a simple way to get the proper amount of yeast from a single tube? I have read a few articles that indicate it can be done, but they all describe a multiple step process. For that much work I'd just rather under pitch or buy another tube of yeast.

# Liters of starter required - I assume that this means that I need to make 1 liter of wort to pitch my starter with, correct? Also, if I only have one tube of yeast instead of the recommended two tubes, does that change the amount of wort needed?

Any and all help on using the Mr. Malty calculator and how to make yeast starters would be greatly appreciated.

__________________
Brewing beer is a fun and rewarding hobby. When you do good, you get beer. When you do bad, you get beer.
It's a lot like recreation league softball.

 
Reply With Quote
Old 09-12-2010, 01:10 PM   #2
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,763
Liked 8032 Times on 5611 Posts


See that "slider" button? You can slide it down to "use less yeast packs" to see the size starter that is recommended with one pack.

That chart is basicially telling you that you need 3.1 packages of yeast, to get the 233 billion cells needed based on the age of the package. To get that amount, you can use 3.1 packages of yeast or make a starter. If you start with 2 packages of the yeast, you'll need a smaller starter than if you start wtih one package (since you have more cells to begin with). If you slide that button the other way, it'll calculate the starter using less packs.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 
Reply With Quote
Old 09-12-2010, 09:49 PM   #3
GRHunter
 
GRHunter's Avatar
Recipes 
 
Jan 2010
Michigan
Posts: 564
Liked 12 Times on 12 Posts


Quote:
Originally Posted by Yooper_Brew View Post
See that "slider" button? You can slide it down to "use less yeast packs" to see the size starter that is recommended with one pack.

That chart is basicially telling you that you need 3.1 packages of yeast, to get the 233 billion cells needed based on the age of the package. To get that amount, you can use 3.1 packages of yeast or make a starter. If you start with 2 packages of the yeast, you'll need a smaller starter than if you start wtih one package (since you have more cells to begin with). If you slide that button the other way, it'll calculate the starter using less packs.
Wow, thanks Yooper_Brew! I was hoping that it would be something simple like that. Also, your new avatar is cute as hell too.
__________________
Brewing beer is a fun and rewarding hobby. When you do good, you get beer. When you do bad, you get beer.
It's a lot like recreation league softball.

 
Reply With Quote
Old 11-04-2010, 09:44 PM   #4
StAnthonyB
Recipes 
 
Nov 2009
New York
Posts: 326
Liked 1 Times on 1 Posts


The Mr. Malty yeast starter calculator thing is on drugs.

It tells me that I need 6.47 liter starter aerated on a stir-plate for my 10.5 gallon batch of 1.048 wort.


I have better pitching rate calculator....

It's a genius system I picked up from a head-brewer. It's called the 4 oz jelly jar system. I take the number of jars I think I need, pour the beer off into a glass and drink. Since I fill my 4-oz jelly jars with cooled wort coming from the boil-tun, I do get some trub and solids. They provide nutrients and all settle out fine. Why pour a starter down the drain when you can have a glass of beer?

I usually use two jars for a 10-gallon British session beer for more flavour or three jars if I want less flavour or less fermentation by-products.

 
Reply With Quote
Old 11-04-2010, 10:44 PM   #5
tunoffun
Recipes 
 
Oct 2010
AZ
Posts: 239
Liked 8 Times on 8 Posts


Quote:
Originally Posted by StAnthonyB View Post
The Mr. Malty yeast starter calculator thing is on drugs.

It tells me that I need 6.47 liter starter aerated on a stir-plate for my 10.5 gallon batch of 1.048 wort.
Well, it tells me you need 2.76 liters of starter using the parameters you provided, and that's using only one vial of liquid yeast to start with.

Who's on drugs again?

 
Reply With Quote
Old 11-04-2010, 11:09 PM   #6
StAnthonyB
Recipes 
 
Nov 2009
New York
Posts: 326
Liked 1 Times on 1 Posts


Quote:
Originally Posted by tunoffun View Post
Well, it tells me you need 2.76 liters of starter using the parameters you provided, and that's using only one vial of liquid yeast to start with.

Who's on drugs again?
Maybe I am. Or... maybe I've been drinking too many 6 month old starters from out of my yeast fridge.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How religiously to you follow Mr. Malty calculator? ebaynote Fermentation & Yeast 13 06-30-2010 09:30 AM
Mr. Malty question...lagers Q2XL Fermentation & Yeast 5 03-15-2010 11:56 AM
Using washed yeast & Mr. Malty carp Fermentation & Yeast 4 02-15-2010 01:34 AM
Using Mr. Malty pitching rate calculator SamuraiSquirrel Fermentation & Yeast 3 11-22-2009 05:18 PM
Wyeast Manufacture Date and Mr. Malty Pitch Rate Calculator brewphilly18 Fermentation & Yeast 4 10-08-2009 06:46 PM


Forum Jump