Originally Posted by Professor Frink
Agreed, but I've read that Campden tablets won't necessarily stop yeast when fermentation really gets going.
Very possible. I don't know the answer to that. The only time I've tried to use C-den to stop ferment was with Brettanomyces. And it didn't work.
Now that I have a bottle, I pretty much just use C-den to bust the chloramines out of my water before I mash in.