Bleach not staying in pool?

[KurtV]

Re-reading Ben's article that Evan linked to makes me doubt that the single dose of Yellow Out is the culprit, especially if bromine is the primary ingredient. Ben refers to "repeated or excessive doses" which a single, normal dose of yellow out wouldn't seem to be. Also, when testing with DPD, doesn't bromine show up just as chlorine would? In other words, wouldn't every ppm of bromide ion that was converted by the chlorine into free bromide, thus "consuming" the free chlorine, show up on on a DPD test just like free chlorine?


Just a thought.