Originally posted by wvlegend
It is coated with some sort of Coraline algea, and is suppose to come to life in a few weeks.
I think it will be fine as base rock, but dont think that it is coated with real corraline algae:
Heres some info I found
Look Alive Reef Rocks - Hand epoxy color painted on reef rock to mimic the look of Coraline algae. Perfect for saltwater and african cichlid tanks.