pinda said:I told her a water change maybe necessary.
That is most likely the problem. SW animals need to adjust to a few water chemistry parameters, not just temperature. A drip acclimation works great, and is easy to do, at achieving this. Here is a link describing the procedure- http://www.aquariumadvice.com/article_view.php?faq=2&fldAuto=18she floated the bag for about an hour then released them.