I am pretty sure this a macro algae. Is it good for a tank, or can it get out of control?
Updated 11-28-2010 at 08:09 PM by melev
Safe, calcerous and rather pretty macro algae: http://www.melevsreef.com/id/annulata.html
I have a few random sprigs of that around my tank. It seems to grow and then just randomly die off.