I was visiting a friend this weekend in Arizona and he was disturbed by a white 'ring' around his pool. He has owned his home for a few years and apparently it has a salt generator installed until one day someone came and stole the cell (but not the controller) so now he just uses a floating chlorine dispenser. Anyway he is looking to get this ring removed and was asking of it's a salt stain? (to me it looks like erosion -but I don't know jack about pools yet) so I was hoping someone of here could take a look at the attached photos and let me know if there is anything that can help or be recommended his with this issue.
Thanks in advance!
Images are attached below and higher resolution images are here:
https://www.facebook.com/media/set/?set ... 62e84b8614