May 29, 2013 #1 Bigjuice562 Aquarium Advice Newbie Joined May 29, 2013 Messages 2 Can anyone explain why some of my live rock is turning redish purple !!! Thanks
May 30, 2013 #2 dmolavi Aquarium Advice Addict Joined Jun 20, 2012 Messages 2,123 Location Sewell, NJ I do believe that is coralline algae. You want that in there.