Mar 30, 2017 #1 brettmontgomery Aquarium Advice Apprentice Joined Mar 12, 2017 Messages 11 What r they? R they bad? If so how to get rid of it?
Mar 31, 2017 #2 Sniperhank Giant Clam Addict Joined Nov 18, 2011 Messages 20,651 Location Summerville, Pennsylvania A macro algae of some sort. Simply pull that piece of rock out of the tank and pluck them off.