I have been taught (30 years ago ) to re - use the yeast left when racking
beer from the primary fermenter. I have done it several time since without
impairing the taste of beer. If your are brewing beer on a continual basis
there is no need to buy yeast. However, if you are not ready to make
another batch right after then you need to buy new yeast.

"homemadeenergizer" m>
wrote in message .com...
> Is there some way to grow yeast using a homemade alternative to the yeast
> energizer sold for wine making? I'd like to be able to re-use the yeast
> from
> one batch of fermentation for successive batches. Subsequent batches do
> not
> ferment well, I assume because of a lack of nutrients in juice (I'm making
> apple cider from bottled juce). I'd like to be able to avoid having to buy
> yeast and energizer from the wine making store. Is there anything I could
> get at the supermarket that would work well for "reenergizing" used yeast?
> Would pureed bananas, a different type of juice (grape?) or flour and
> water
> or something like that work?
>
>
> Thanks
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