Quote Originally Posted by aylad View Post
if it's sodium dichloro.........(long, unpronounceable word), then that also contains CYA, actually more pound-per-pound than trichlor does, if I'm not mistaken.
Jan is right about that. Dichlor adds 9ppm of CYA for every 10ppm of chlorine it adds. Trichlor adds 6ppm of CYA per 10ppm of chlorine.