Jul 29, 2012 #1 R Redwing1964 Aquarium Advice Newbie Joined Apr 16, 2012 Messages 2 This is growing on two of my lr. Any ideas Attachments image-845937369.jpg 126.8 KB · Views: 110 image-523357827.jpg 139.9 KB · Views: 123
Jul 29, 2012 #2 Flreefer Aquarium Advice Addict Joined Feb 11, 2012 Messages 1,984 Location SW Florida Looks like sponge, IMO.
Jul 30, 2012 #3 OP OP R Redwing1964 Aquarium Advice Newbie Joined Apr 16, 2012 Messages 2 Thanks, that is what I was hoping.