Is this growth ok in my reef tank?

[naesco]

Originally Posted by newreefer_59

I have had this black pinnacled velvetey type growth for the past few months on some of my live rock. I did ask about it before, but was unsure of the responses.

Anyway, it is about the size of a loonie and I would like to know if I should leave it, remove it or love it?

Please advise.

Cool, What is it?

[belzebuth]

I will bump this post. Interested to know what it is as well. Anyone?