Feb 24, 2013 #1 Gza166 Aquarium Advice Freak Joined May 18, 2012 Messages 249 I have this stuff growing on the glass and I have no idea what it is. Attachments image-45106201.jpg 128.7 KB · Views: 131
Feb 24, 2013 #2 fort384 Dividing by 0 Site Team Joined Nov 23, 2008 Messages 13,931 Location Illinois Hard to tell exactly from the pic, could it be Digitate hydroids?
Feb 25, 2013 #3 Dimdim Aquarium Advice FINatic Joined Dec 18, 2012 Messages 862 Could be a nassarius trail