Looking great. if its hard its coraline, if it blows off with a turkey baster its cyano likely. Im leaning twords coraline.Quick little update... this is coralline, right? (under the diatoms, lol)
I had found a new patch on a piece of well-established live rock, but it's spread over my fresh marco rock like wildfire! Just over 5 weeks in right now; that seems pretty quick, right?