After racking my beer, there is obviously a lot of stuff left at the bottom. Now I can only presume that this is yeast. The amount compared to what I originally put in is vastly increased... I take it this is because it has grown some what!
IF I was to save this to use again (not something I will currently be doing as I always get yeast with the extract I buy) how much would I need to use in a new beer (I will eventually be moving up from extract)
Also, can this be frozen safely for use sometime in the future? If not, what is the best method of storing and how long can it be stored for!
Much appreciated, Simon