Not wanting to start some big argument, this is just for my own interest and I am sure there are some major differences, and concentrations are probably very different. I am no chemist but was a member of our "Emergency Spill Response Team" at the chrome plating shop I worked at an am somewhat familiar with chemical data sheets. The article says that household chlorine contains salt and other things. But Sodium Dichlor is listed to be in the same reactive group as salt. As the name suggests, doesn't Sodium Dichlor have sodium, which is basically salt (NaCL)?