I a planning to start 2.5 Gal batch (English bitter, from Munton's no-boil kit), and I have pitchable White Labs yeast which says that it is good for 5 Gal batch.
Should I use only a half or is it Ok to use it in full?
Guy in the homebrew store told me it is ok to pitch whole vial content, faq on white labs web-site says that 'If the beer is overpitched, yeast do not grow though a complete growth cycle. This results in few new yeast cells, which makes for unhealthy yeast and low viability by the end of fermentation.
What do you think?
Also, if I use only a half, can I keep the rest in the fridge an use it in ~3-4 weeks?