Originally Posted by hal simmons
Are you supposed to (or is it necessary to) aerate your beer when racking onto a yeast cake? As i understand it the oxygen it to provide the yeast fuel during the multiplication stage before going into the fermentation stage. If you're racking onto a cake, don't they go straight into fermenting the beer?
While true your yeast won't need to reproduce you are not making the best beer you could. A yeast reproduction phase is necessary to get yeast flavours imparted to the beer. That is why there are yeast pitching rates. Use the calculator at: http://www.mrmalty.com/calc/calc.html
to determine how muc of your yeast cake to use.