[I have noticed on the sand underneath one Live Rock (all LR recently added 1 1/2 ago) small cylinders of stuff like sand. This morning when I looked at the tank I saw one fall from the rock into the pile that is forming. The tubes are about 1" long, 1/16" - 1/8" wide & tapered at the ends. Does any body know what creature could be causing it?
Thanks!]
Thanks!]