Reusing yeast cakes can be a way to save some money and get a homebrewing going faster. Im making small batches so Im using a smaller fermentor so the trub does add up fast. As I let my homebrew set for 30 day this will be the last batch using this yeast cake and I didn't think it looked good at bottling. This yeast cake was used on 2 other batches making this the 3rd batch