I harvested 2 different yeast due to the fact they are only available for a short period of time each year. Now I have a number of questions concerning the storage after harvesting.
To be exact they are Wyeast 2352 and Wyeast 1581. I intend
to use them during the rest of the year.
First is how long they can be kept before they are not any good. I store them in a temperature controlled freeze which is any where between 45 to 60 F. This is also the freeze I use to lager.
Second is a friend of my son in law who has been doing this for some time has told me that after 4 months he runs a yeast started on his harvested yeast and then puts it back in storage to keep the yeast from dieing. Is this a waste of time and is it worth the time and cost.
Last is how many times can I harvest the yeast and reuse it before it just will not ferment any more. In other words it has died.