Randy Holmes-Farley
Reef Chemist
View BadgesStaff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
- Joined
- Sep 5, 2014
- Messages
- 67,339
- Reaction score
- 63,686
Wow! Cemented rocks! Was it corraline?
Not sure, but I expect some was other types of calcerous organisms (tube worms, etc.) and sponges, etc. as it is in darker areas.