May 9, 2012 #1 Readingexcalibur Aquarium Advice Addict Joined Dec 30, 2011 Messages 1,305 Location Las Vegas these are in my nano, any idea. Looks like worm holes. But I think I can see something digging in them.
these are in my nano, any idea. Looks like worm holes. But I think I can see something digging in them.