Hi all, my friends brother gave me about 30 lbs of rock that he bought from oceans in glass . After looking at the rock It looks painted to me? The rock is purple and pink but its not coraline. Is this safe for a reef tank? Will the paint come off eventually? He paid a lot for this rock as its advertised as live premium rock. Any input would help.... wanna put it in my frag tank and sump. Thanks, Peter