Hole in coral

[fishy_star]

Hey,
My Mom added a coral maybe a month ago to her tank and we started noticing these white spots and now it turned into a hole through it. Can anybody give me insight on what could be causing this or how to fix the problem?

 

[Jekyl]

Mind giving us some background? Age of tank, current parameters, lighting used and settings? Some white light pics may also help out.

 

[Mr. Mojo Rising]

You didn't even mention what kind of coral? Need more info and pictures please.

 

[StartingATank]

Pics please. Also need Parameters and Coral type.