So, recently I tried an experiment of mine to see if I could capture the Co2 from a fermentation to a pb and hopefully find some reasonable results. So on day five of the fermentation of an extract beer. I dropped the contents of the fv into the pb. I can't say that it was overwhelmingly positive. So the question I ask is, how early can I put an extract beer while fermenting into a pb? And would an AG brew behave in much the same matter. I am in good mind to do it at day four. Thoughts please =)