Thanks ArcaneXor and remilard,
Originally Posted by ArcaneXor
Primary yeast is a lot more diverse, giving you a blend of early, "normal" and late flocculators, hence it is preferred for harvesting.
By now I'm using primary yeast and the tecnique showed here
. This should take a good mix of yeast.
Originally Posted by remilard
This is easy with a cylindroconical fermentor and pretty tricky without.
Now I know what I can do with that old demijohn I have!!
Maybe next year I'll try to put it upside down, close the opening with a faucet and have a glassworker cutting a large opening on what it's now the bottom...