Thanks that gives me some ideas to try 
Jason, a helpful neighbor or a spiteful neighbor? lol they swear nothing was added, and there is no chlorinator nor SWG.
My only concern is when I first got the purple - I started to add some acid and I could see it turning that yellow brown color again so I stopped. I'm afraid if I lower the PH now it will happen again. So I'm just gonna wait until Friday to re-test the PH, I figure the FC should be pretty low by then. The whole thing is just strange.
She said tablets in a floater - didn't specify bromine but she'll be home on Friday so maybe I'll get more details then.
Jason, a helpful neighbor or a spiteful neighbor? lol they swear nothing was added, and there is no chlorinator nor SWG.
My only concern is when I first got the purple - I started to add some acid and I could see it turning that yellow brown color again so I stopped. I'm afraid if I lower the PH now it will happen again. So I'm just gonna wait until Friday to re-test the PH, I figure the FC should be pretty low by then. The whole thing is just strange.
She said tablets in a floater - didn't specify bromine but she'll be home on Friday so maybe I'll get more details then.