My 25' is fine for 5g batches. It takes 20 minutes or so, but that is no big deal. Gives me the time to get the carboy ready. If you do 10g batches, you will want a larger one. but if are going to spend the money for the larger one, get a CFC instead. Not that much more $, and really what you should have for that size batch. Bobby_M made a how-to if you want to make one, also.