Feb 20, 2013 #1 Acfish Aquarium Advice Apprentice Joined May 9, 2012 Messages 19 I bought a rock and noticed this growing on it its a brown tube there is three of them any ideas
Feb 20, 2013 #2 OP OP Acfish Aquarium Advice Apprentice Joined May 9, 2012 Messages 19 Picture is sideways