The problem with this procedure is that you are limited to the yeast left in the secondary, that is slow to floculate, and you have none of the cells that start fast, work hard, and drop out on schedule. These have all been left in the primary. Secondary yeast selection leaves your beer under attenuated and "dusty". You will have clarity issues.Quality Home Brew said:if you cold crash in a secondary, nothing but good clean yeast left no trub, pitch right on top of that, its about half the size too