Irish moss works in the boil, it won't do anything in secondary. If you need to clarify beyond what occurs naturally (it is, remember, a clearing tank), use gelatin, or I think polycar and Isinglass will work in the secondary.
"I'm kind of toasted. But I looked at my watch and it's only 6:30 so I can't stop drinking yet." - Yooper's Bob "Brown eye finally recovered after the abuse it endured in Ptown last weekend, but it took almost a full week." - Paulie "no, he just doesn't speak 'stupid'. i, however, am fluent...." - motobrewer "... I'll go both ways." - Melana