People like to add bleach while cleaning white cloths and linens. If you are adding it solely for its disinfecting properties, wouldn't a chlorinated water supply (my water is around 1ppm) suffice in disinfecting your laundry, especially since the CYA level should be zero. My only guess against my previous statement is that the fabric itself is "attacked" by the bleach, which will use up all the FC. Even if that is so, I would think one would only need to add perhaps an ounce to totally disinfect even the largest load of laundry. Obviously, I'm bored today .