Sep 7, 2012 #1 Clownfish25 Aquarium Advice Activist Joined Feb 18, 2012 Messages 184 Have noticed fuzzy white patches begin to appear on my live rock, does anyone know what this may be? Attachments image-2929204991.jpg 178.1 KB · Views: 97 image-3534568683.jpg 185.5 KB · Views: 91
Sep 8, 2012 #2 K kdpuffer Aquarium Advice Addict Joined May 8, 2011 Messages 2,360 Location Alberta canada Looks to me like they are sponges.
Sep 8, 2012 #3 circus clowns Aquarium Advice Freak Joined Jan 9, 2012 Messages 225 Location NY I would say sponge