Birds nest out of water

[likwid]

Hey guys,

I was wondering how long a birds nest coral can stay out of water for? I have it at the very top of my tank, but when I do a water change, the water level drops and part of it sticks out of the water. It was out for about 20 minutes while I was preparing my waterchange, and now the top part that was out is turning white. Is that was is causing this?