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Old 07-06-2012, 04:27 PM   #1
Otiluke
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Default Yeast Starter and stepping

I plan to brew tomorrow and I think I've messed up my starter. I plan to brew a 10 gallon Batch of Ed Worts heff. I had one pack of 3068 and made a 2l starter (200g of DME) last night and pitched yeast about 1 am. I really didn't read the directions well and i should have made a smaller starter, started earlier, and stepped up. So my questions are:

Should I just purchase another pack and add that in to my starter today?
Can I just add more Wort today with out decanting?
Should I try and refrigerate today and see what I can get out and do another starter?

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Old 07-06-2012, 04:31 PM   #2
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1 pack in a 2L starter is just fine, unless the pack was really old. No need to buy more.

Check out this site:
http://yeastcalc.com/

You can plug in everything and see where you stand.

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Old 07-06-2012, 06:00 PM   #3
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according to that site i'm like 200b short of the amount of yeast cells needed.

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Old 07-06-2012, 06:48 PM   #4
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Actually IF you are a bit short on yeast cell count, your hefe will have a more pronounced banana flavor+aroma. Not a big deal.

I often pitch 1 Wyeast pack into a 2L starter. Works fine.

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Old 07-06-2012, 07:34 PM   #5
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Default question on use of web help

Can a home brewer (me) just go ahead and make a 2L starter right off the bat without going thru stepping?

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Old 07-06-2012, 07:45 PM   #6
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Quote:
Originally Posted by Sheldon View Post
Can a home brewer (me) just go ahead and make a 2L starter right off the bat without going thru stepping?
Totally depends on cell count. I usually shoot for 50-150 million cells / mL of starter wort.

So, you don't want to pitch 10 billion cells into 2L, but pitching 100 billion should be just fine.
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Old 07-06-2012, 07:49 PM   #7
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Quote:
Originally Posted by Otiluke View Post
according to that site i'm like 200b short of the amount of yeast cells needed.
What is that on a percentage basis? 200bn shy seems like a lot to me...is that ~50% of what you need? Underpitching is often recommended for hefes as the Canuck said, but grossly underpitching does more harm than good, IMO.

Do you have any aeration (shaking, stir plate) on your starter?
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Old 07-06-2012, 08:03 PM   #8
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What is that on a percentage basis? 200bn shy seems like a lot to me...is that ~50% of what you need? Underpitching is often recommended for hefes as the Canuck said, but grossly underpitching does more harm than good, IMO.

Do you have any aeration (shaking, stir plate) on your starter?
according to yeastcalc it says :total cells needed [billions] 267 in red. so I take that as short. It also says that i need 390. So yea I'm at like 50%.
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Old 07-06-2012, 08:07 PM   #9
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390 - 267 = 123 cells short

The number listed on the top (390) is the total number you're shooting for. The number in red (267) is what you have after the starter, it's red if you're short. It is NOT the amount of cells you're short.


123/390 = 32% short...an underpitch, but not drastic. I'd be ok with that for a hefe.

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Old 07-06-2012, 09:47 PM   #10
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390 - 267 = 123 cells short

The number listed on the top (390) is the total number you're shooting for. The number in red (267) is what you have after the starter, it's red if you're short. It is NOT the amount of cells you're short.


123/390 = 32% short...an underpitch, but not drastic. I'd be ok with that for a hefe.
I think that you might be looking at my post wrong. The red number is what I need to reach the 390.

To try and solve this mess what I have decided to do is swing over to the brewstore and grab another yeast pack. chill the original starter for a few hours and make up another 1 liter starter and pitch the new yeast and "old" yeast together.
yeastcalc.jpg  
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