2 questions

[ABC]

I am referring to post 171 on this thread.

http://www.manhattanreefs.com/forum...2-new-180-upgrade-build-o-18.html#post1563100

What is growing on the back wall? What is with the tangs eye?

 

[Jim]

The back wall is coraline algae and the tang may be a touch of HLLE.

 

[ABC]

Thanks. That is some thick coraline on the overflow box.