[BlueAbyss]

Okay, so it was cyano? I thought cyano was sort of translucent?

I suspected something like this, but cyano seems to sort of... take over people's tanks? This stuff was really slow growing, like it took 2 weeks to cover a square inch.

EDIT: Looking a little harder, I notice that some of the burgundy stuff is still in the deep holes and crevices in the rock. Just small spots of it though, the surface has been cleaned clear of it.