Jun 27, 2013 #1 Leeh24 Aquarium Advice Regular Joined May 23, 2012 Messages 56 Location Newcastle Under Lyme United Kingdom Got this live Rock today and it has this green stuff on it. Is it algae ? Good or bad ? Attachments image-2203853653.jpg 126.2 KB · Views: 90 image-2396090859.jpg 97.6 KB · Views: 91 image-2168511604.jpg 126.2 KB · Views: 78
Jun 29, 2013 #2 ezy33 Aquarium Advice Addict Joined Apr 16, 2005 Messages 2,545 Location San Francisco's Barbary Coast It's hair algae, bad and will take over your tank.