Why did my blond Highlights turn orange?

Every time I go to a public pool my blond highlighted hair turns orange-red at the tips.  I have long blond hair naturally, and I know my stylist uses a bleach highlighting agent.  What is causing this weird color change, what can I do to prevent it (other than no more swimming - I love to swim) and what can I do to change the current orang-ish color?  Thanks for any tips!

Edited by Kosmo - April 16 2008 at 1:34pm

A mix of chlorine and copper pipes in a pool will make lightened hair turn greenish, but not orange.  That's a little strange that its turning orange.  (To get rid of any greenish tint from that, use a dilute vinegar rinse after you go to the pool, or a clarifying shampoo.  Anything acidic like that will help rinse off the copper residue).  Since its turning orange though, I'm not too sure what to tell you.

 Are you getting it lightened just to dark blonde, or to a very light blonde?  Maybe if its darker blonde, the pool water is messing up your toner or the base in the dye that was used, allowing more orange to show through.  If its lighter highlights, like yellow or white, I'd guess its a residue and try the clarifying shampoo.  If your highlights are dark blonde though, I don't know if I'd try that, it might make it worse.