Mar 26, 2012 #1 bigben2057 Aquarium Advice FINatic Joined Mar 4, 2012 Messages 600 Location Henderson, NV I noticed this eggsack like thing on my zoas and i think its stressing them I don't know what it is. Attachments DSC01939.jpg 140.9 KB · Views: 71 DSC01934.jpg 184.9 KB · Views: 72