white spots on LR ??
 

Over the last few days I have been noticing some of my LR is getting white spots on them more like the coraline algea is falling off or chewed off I have not seen this before. anyone have idea or heard of this before?

maybe its bleaching,
most of my liverock bleached when i first set it up, but then after a few months all the coraline came back

Do you have an urchin?

yes to an urchin a small one but it has never eaten pieces like that .

Growth/Death
 

Usually white in coraline algae is an indication of growth or death. Any abrupt changes in tank chemistry that might of caused it? Other than than that the only thing I could attribute it too would have to be your urchin, they are known for it after all.
Levi