I'm about to make a starter for next weekends brew (a Mocktober fest using a Kolsch yeast), I'm going to build up the starter a few times so that I can save and freeze some of the yeast. This will be the first time that I've used Wyeast smack pack as my LHBS doesn't carry White Labs anymore (they said they just weren't selling??). What is actually in the smack pack? I assume there has to be some sugars and probably some yeast nutirent in the part that you break open. My question is, should I use some more yeast nutirents in my starter like I have in the past or is this not nessesary with the smack pack? (along the same lines, can you add to much yeast nutrients?)