Jan 17, 2014 #2 R Raf77 Aquarium Advice Newbie Joined Jan 16, 2014 Messages 6 I mean the green marks...
Jan 18, 2014 #3 Piercy87 Aquarium Advice Regular Joined Sep 14, 2012 Messages 87 Looks like flat worm they are hitchhiker a on live rock ect
Jan 18, 2014 #4 Piercy87 Aquarium Advice Regular Joined Sep 14, 2012 Messages 87 I read up about them yesterday. Here's the article.