How fast is too fast?

[ChrisR73]

So first time re-using yeast and it’s racing along like a really fast thing.
1057 to 1024 in 48 hours @ 18 degrees and I’ve never heard so much noise from an airlock!

So basically I’m asking if this is a problem?
At this rate fermentation will be complete inside 5 days.

 

[Rochefort]

That is how fast it should be going with little to no 'lag'.

 

[MmmBeer]

By re-using yeast, you probably pitched far more than the usual amount in a sachet or vial. This will eliminate the 'lag phase' where the yeast is multiplying to sufficient numbers to ferment your wort, however this is usually only 12-24 hours. Some yeasts just work quicker than others, just leave it to do its stuff and clean up after itself. Often dropping the temperature by a degree will slow the process down and produce a cleaner beer.

 

[Thatscold]

A 42L batch I brewed last Sunday reached FG by Wednesday evening using S-04. I will do 10 days at 19C and 3 days at 0.5C before I keg.

 

[ChrisR73]

By re-using yeast, you probably pitched far more than the usual amount in a sachet or vial. This will eliminate the 'lag phase' where the yeast is multiplying to sufficient numbers to ferment your wort, however this is usually only 12-24 hours. Some yeasts just work quicker than others, just leave it to do its stuff and clean up after itself. Often dropping the temperature by a degree will slow the process down and produce a cleaner beer.

Thanks for that - coincidently my heater packed in so it’s actually running at 16-18C instead of 20C.
Would be finished now at 20C I think!