Help! One clownfish dead, the other not so good!

Thanks everyone for your comments. My male clownfish died shortly after the female. I also have a coral beauty angelfish, and she seems not to be affected by whatever the clownfish died of. Actually, after we got the beauty, she was very colorful for about a week, then the color of her got pretty dull. About a few hours after the clownfish died, her brilliant purplish/blue, orange, and yellow came back. She looks great now. I'm wondering if the clowns died of stress. Anyway, thanks again!
~Brittany