Something on Live Rock! Help!?!

[ankleknee10]

My buddy just put live rock in his new SW aquarium and has been doing a fishless cycle. This algae (atleast I think that is what it is) has started growing on his live rock. Is this anything bad and if so how should he remove it?

 

[Bonessurf]

It's cyano... It has to do with nitrates and phosphates in your water. Suck it out and increase water quality.

 

[ankleknee10]

Thanks a lot!! I will let him know what to do!