To Do or Not To Do......A Diacetyl Rest

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perryni

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I have been fermenting my first lager for just over a week now.

I cooled the wort down to 8c and pitched my yeast, then warmed everything up to 10c where it has sat ever since.

I plan to leave it fermenting for 4 weeks in total BUT should I do a diacetyl rest or not as I have heard you only need to do this if you ferment at higher temps?

If I do need to do one what temp should I raise it to and for how long?

Cheers
Nick
 
I would say yes as Diacetyl is still being produced though not as much as with an ale yeast. A good article here in BYO about it. :thumb:
 
Thanks for the info.

I am away with work this week so the first time I will be able to do this would be Friday night, so it will have been fermenting for around 12 days, I will take a hydrometer reading but fermentation might be complete by then.

Will a diacetyl rest still work if fermentation is already complete?
 
Yes it would still work, even at cold temperatures the yeast will still clear up the Diacetyl but it just takes longer. :thumb:
 
paulpj26 said:
Yes it would still work, even at cold temperatures the yeast will still clear up the Diacetyl but it just takes longer. :thumb:

Much longer. Without d rest it would take 6-8 weeks from mash to bottle.
 
and if didnt do it....it will desapear in the bottle???? :cheers:
 

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