need help how many times can i grow yeast from a starter

[Glynn]

I cant seem to find an answer as to how many batches i can make from a smack pack. I just bought a fresh pack of 1056 and started a 1 qt starter. After its done i want to cold crash it and wash it so i can pull additional starters from it. How many times can i grow starter from my original starter..

 

[orangemen5]

Read this might be what your looking for

https://www.homebrewtalk.com/entries/yeast-harvesting-novel-approach.html

 

[orangemen5]

I've grown mine this way up to 10x. Prob could go more because its so clean i just haven't tried it yet.

 

[rmb]

For a half a pack of US -05, how much dextrose and water and time is ideal for a starter? I only ask because I used half in 7 ounces of warm water with a scoop of dextrose... for 45 mins.

 

[KepowOb]

For a half a pack of US -05, how much dextrose and water and time is ideal for a starter? I only ask because I used half in 7 ounces of warm water with a scoop of dextrose... for 45 mins.

Generally you don't make a starter from a dry yeast like US-05, you just rehydrate them... And even then people debate how useful it is. Starters are made with liquid yeast, and you're looking at 24h timeframes from what I understand.

 

[Glynn]

Read this might be what your looking for

https://www.homebrewtalk.com/entries/yeast-harvesting-novel-approach.html

I have read this a few time but was unsure as to how many times you can wash a starter. In the past I have always I have always made about 21 batches from a single pack by washing my first batch and getting 4 new pints and then repeating the process after using the last pint. once i hit the fifth wash I've noticed the yeast starts to become unpredictable.

 

[orangemen5]

Once it becomes unpredictable that's when I would stop. 21 batches is a good value for a $7 pack. I would start with fresh yeast when they start to get that unpredictable.

 

[grathan]

I'd bet you can get 21 with the new method.

 

[Pratzie]

If your going with one pack, ur best bet is slanting.

https://www.homebrewtalk.com/f163/slanting-yeast-133103/

There are different arguments as to how many generations u can get from one batch of beer before it starts to change into a slurry that will give off different and undesired flavors. I've read some people say 7-8, others have said upwards of 10-12. But if u slant, ur always on the same generation, just build a starter and step it up once or twice and ur good to go. If im not mistaken, this is how a lot of people do it. Buy one big order of different yeasts from an online HBS when they are having a sale, slant the various strains and it keeps them going throughout the year.