+1 not cyano! I am not a seasoned reefer (1 year) but I recommend more flow, RODI, water changes, cuc and time. Don't be suprised if your WHOLE tank gets covered in this stuff but it should go away as fast as it appears. As you already may know, coralline algae will take a while to grow but you will get it. Looks like you are on the right track though!