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Old 04-16-2013, 01:43 PM   #1
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Default Yeast starter together with dry yeast

I brewed 50L lager and made 2L starter out of washed yeast. I pitched starter and also 11,5g rehydrated dry yeast, cause i have only one 2L Erlenmeyer and i wanted to add some more yeast. Also i thought, that fresh dry yeast is good for next yeast washing. Am i on the right way?

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Old 04-16-2013, 06:49 PM   #2
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Your post leaves a little to be desired in the way of information. I am going to make some assumptions.

I'm going to assume an OG of around 1.050. Therefore, according to YeastCalc you needed over 900 billion cells.

I'm also going to assume that the yeast from the starter is the same strain as the dry yeast you also pitched (if I'm reading the post correctly).

Again, I'm going to assume you don't have a stir plate.

With all of these assumptions you pitched about 300 billion cells (200 from the 2L starter and 100 from the sachet). You pitched 1/3 of what was needed. Prepare for a SLOW fermentation.

At what temperature is it fermenting?

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Old 04-17-2013, 06:56 AM   #3
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Thanks. OG was 1.046. Yes, yeast starter is the same strain as dry. I do have stir plate. It is fermenting at 11 deg C. Liquid yeast was harvested at 07. March 2013. Beer has fermented 2 days now. Would it be good idea to pitch some more dry yeast now?

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Old 04-17-2013, 08:55 AM   #4
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Quote:
Originally Posted by jhoyda View Post

With all of these assumptions you pitched about 300 billion cells (200 from the 2L starter and 100 from the sachet). You pitched 1/3 of what was needed. Prepare for a SLOW fermentation.
11.5g of dry yeast has around 220bn cells is my understanding.
Depending on the age of the rinsed yeast and the quantity he put in the starter then he may be nearer say 500bn.
However as you have rightly pointed out it is still way below the 850bn recommended.
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Old 04-17-2013, 01:26 PM   #5
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Quote:
Originally Posted by el_caro

11.5g of dry yeast has around 220bn cells is my understanding.
Depending on the age of the rinsed yeast and the quantity he put in the starter then he may be nearer say 500bn.
However as you have rightly pointed out it is still way below the 850bn recommended.
Yep you're right had 100B in my head from liquid packs for some reason.
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Old 04-17-2013, 06:13 PM   #6
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But is it too late for now to pitch some more yeast in fermenter?

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Old 04-17-2013, 11:15 PM   #7
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Nope, go right ahead. What strain of yeast are you using?

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Old 04-17-2013, 11:24 PM   #8
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Quote:
But is it too late for now to pitch some more yeast in fermenter?
When did you make the original pitch?
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Old 04-18-2013, 06:34 AM   #9
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Original pitch was made on 13. April evening. On 15. April morning it fermented actively and for now it is slowed down a little bit. I am using W-34/70 yeast strain.

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Old 04-18-2013, 01:21 PM   #10
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Since it was several days ago, I'd just let it ride and see what happens. If it eventually stalls for whatever reason, then consider pitching more. Use your hydrometer to tell you if it's still chugging along, not airlock/blow-off activity.

You did under-pitch, so there could be some mild off-flavors, but it will most likely still finish (even if slowler than ideal) and you will still have beer. Either way, this is a great learning experience in regards to watching pitch count.

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