It is a brownish color. My tank is about 6 weeks old. I do have a clean up crew. 3 medium hertmit crabs, 2 large hermit crabs, 2 small hermit crabs, and a large snail. The large ones are the size of a half dollar.
The other animals I have are:
1 Neon Goby
2 Clown Fish (perculas)
2 yellow...