Hi Chem Geek,
Below is an excerpt from another site. I suspect your reply was in the context of a swimming pool. I do not know if the same discussion applies to a spa. I have hightlighted your comments in red below. My questions are for a spa.
QUESTION 1: Will shocking a BCDMH, bromine sanitized spa with sodium hypochlorite, chlorine create bromate?
QUESTION 2: Since BCDMH already contains chlorine are you recommending/suggesting KMPS is a better choice for shocking a bromine spa?
Bromates: Most discussions mention the bromate carcenogenic concern for drinking water and question skin absortion rates. My question/concern is breathing warm moist air that contains bromates while in a spa.
I truly appreciate the opportunity to ask questions. For me this is about safety first, then the convienece/work to maintain the spa followed by the enjoyment of useage.
Moderator note: The copyright material from another site was removed