I want to use chlorine in my bath tub, what's the best way to measure it?

so that it isn't too strongI want to use chlorine in my bath tub, what's the best way to measure it?
a ph readerI want to use chlorine in my bath tub, what's the best way to measure it?
use a pool test kit (OTO solution) to measure amount of chlorine in water....some city tap water already has chlorine or chloramines
Sorry, Michel Jackson didn't use chlorine. Check into a chemical peel.