Jhoff1988

Hey guys yes I am new. Got a 200 gallon hot tub. I used some all in one sanitizer and shock. Bought some test strips. And this is where I’m confused. My test strips shows proper amounts of total chlorine and free chlorine but it also is showing levels of bromine. Shouldn’t my bromine be 0 on those strips? From my understanding you either use chlorine or bromine for your sanitizer. Sorry if this a dumb question but I searched everywhere couldn’t get an answer. So now I ask. Thanks.