Mar 11, 2014 #1 A artur Aquarium Advice Freak Joined Jan 2, 2008 Messages 369 Location Naperville Il Can you guys tell me what is this fluffy staff growing on i think old LPS skeleton? Thanks. Attachments 20140303_211020.jpg 155.3 KB · Views: 78 20140303_211053.jpg 199.3 KB · Views: 70