

What kind of agae is this and what will eat it?
I currently have a yellow tang, an algae blenny,
zebra and red-legged hermit crabs, and some snails
and nothing seems to eat this stuff, which has recently appeared,
enough to make a dent. These pictures are about two weeks of
growth. There are several patches like the one in the picture.
The tank is a year old 55 gal system. Water is RO/DI,
nitrate is reasonable (about 5), and otherwise the tank is
doing fine.
Thanks for your help!