I hope so. If you are right then that means my wife will think I know what I am talking about. :smile: I told her "I believe it's the start of coraline algae."
Yes, several of pieces of my live rock have small areas of nice purple growth. This is the first sign of anything on the overflows. My tank is visible on the front, right side and back, so I clean those sides with Mag Floats every day or two.