Jul 26, 2011 #1 M mw174620 Aquarium Advice Apprentice Joined Jul 4, 2011 Messages 14 It's light black to grey. On all of my fake plants and some on rocks. Attachments image-4248229772.jpg 62.8 KB · Views: 48 image-3310541167.jpg 39.1 KB · Views: 50
Jul 26, 2011 #2 OP OP M mw174620 Aquarium Advice Apprentice Joined Jul 4, 2011 Messages 14 It might not even be fungus. That's just what I expect.