How many times can I re-use yeast? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > How many times can I re-use yeast?

Thread Tools
Old 09-28-2012, 10:48 PM   #1
Jul 2011
Sydney, Australia
Posts: 23

Probably been asked hundereds of times, so apologies in advance.

I purchased a Wyeast 1728 Scottish Ale smack pack and it is currently fermenting its 7th batch. I do 14 litre batches each time.

To re-use, when I bottle straight from the primary after 3 weeks, I simply drain the yeast cake into a sterilised container and put it in the fridge. I generally use the yeast 1-2 days later.

Question - how many times can I do this? Each fermentation has been great and takes off very quick, sometimes in less than an hour. I have been hitting the FG's spot on each time with attenuation in the 80-85% range.

Guy in the local home brew shop said the yeasts can mutate. Will I get alien flavoured beer?

Reply With Quote
Old 09-28-2012, 11:04 PM   #2
tally350z's Avatar
May 2011
Tallahassee, FL
Posts: 1,288
Liked 90 Times on 75 Posts

As long as it is turning out great keep going. I have read people using yeast into the 30th ish generation.. Preventing contamination is the key to long term success..
Toasting Tortoise Brewery
Primary - Smoked Belgium
- Burton IPA, Munich Lager, Cream Ale
Bottled - Muscadine Port, Imperial Stout

North Florida Brewers League

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
1.03 FG with washed yeast, multiple times! sfrisby Fermentation & Yeast 3 05-10-2012 08:01 PM
How many times is to many? 5oclocksomewhere Fermentation & Yeast 8 10-18-2011 07:20 PM
How many times can top crop yeast from the same batch ? jfr1111 Fermentation & Yeast 0 02-13-2011 02:32 AM
Liquid vs Dry Yeast Fermenation Start Times kingmatt Fermentation & Yeast 13 11-16-2010 11:25 PM
Reusing Yeast - How many Times? Cpt_Kirks Fermentation & Yeast 40 11-27-2009 01:51 PM

Forum Jump