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Split Yeast Cake

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wombil

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Lo Guys,
This might sound a bit lousy but I don't feel like going to the shop today.
I have done 3 brews so far on the same us-05 yeast cake.All came out ok.
If I take half of this yeast cake/slurry,will it be enough to pitch into 20 litres of wort?
Should be ok I think.
 

sponge

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As far as I remember, 1/2 cup mixed slurry (yeast cake and small amount of leftover beer) is good for 5 gallons (~20L) of standard (1.050) wort.

1 cup for double batches or 1.060+ of 20L wort

Thats roughly what I use when re-using yeast and hasn't failed me yet.



Sponge



EIT: Or the Mr Malty calculator as liam has pointed out above. Took me a while to finish the post and missed the reply...
 

wombil

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Thanks Guys,
Looks ok then,should be more than enough in there.
wombil.
 

brettprevans

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are you asking about the quantity of yeast of the quality of yeast? ie if its mutated after 3 generations?

if its the former, youv'e got your answer already, if its the latter, then i'd still use it. ive used us05 5 times. after that it gets a bit funky.
 

Aces High

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are you asking about the quantity of yeast of the quality of yeast? ie if its mutated after 3 generations?

if its the former, youv'e got your answer already, if its the latter, then i'd still use it. ive used us05 5 times. after that it gets a bit funky.

I had a brain explosion and used about 2 cups of US05 slurry the other day into a 20L batch in a jerry can (i use less than this into a 40L batch usually) It took off like a rocket. After a day the elastic band and cling wrap cover were just hanging onto the jerry can. The cling wrap had pulled through the elastic band and formed a bubble about the size of my first and there was foam seeping through and down into the fridge.
 

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