Irish Moss/ Carageenan
i use this stuff 20-10 minutes before the end of the boil lining up with my hop addition. I find it helps get a clean cold break and you can be slightly more slack on your cooling post boil. If you use a no chill method I would highly reccomend this stuff, i have done this with great success.
Brody Huk from burlington, ON Canada on 8/22/2013