Me: "Evan, So it's probably not bromine, right? It would be showing up on the tests at a much higher level if it was there, wouldn't it? (Excuse my ignorance if I'm misreading your post.)"
Waterbear: "Not unless the tester is also calibrated for bromine readings and you use that scale!"

Me again: I was under the (perhaps mistaken) impression that with the Tayor DPD test you couldn't really tell if you had chlorine, bromine, or a combination of the two. Further, that you only multiplied by the bromine factor (2.25) when you knew you had bromine sanitized water; otherwise you just assume it's chlorine. Am I way off here?