Quote Originally Posted by waterbear
Not really because the bromine reading is 2.something of the chlorine reading (I think it's 2.25 but don't hold me to that!) so if he was showing 1 to 2 ppm chlorine in the pool and was actually testing bromine it would have been over 2ppm to over 4 ppm bromine level.
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.)

If it was ammonia based, wouldn't it already have been consumed by the relatively high doses of chlorine he's been using?

You may, of course, yet be right (as you usually are), but I'm guessing Dave was on to something with his lurking organic theory.

Waterman, I don't think anyone is saying that the Yellow Out, whether bromine or ammonia based, is falsely supressing your chlorine test readings. Rather something is consuming your chlorine.

Read the 2nd of Ben's articles that Evan linked to; it should answer your question on getting the bromine out.

As to what you should do, absent some other revalation, I think going back to the basics of keeping your chlorine at shock levels, until it holds over night, is your best bet. According to Ben's Best Guess chart, for a CYA level of 60-70, that would be 20 ppm (http://www.poolforum.com/pf2/showthread.php?t=365)

Best of luck.