Can someone I'd this?
 

Hi
I went on a week trip and came back to find this growing on one of my corals.

Can anyone id this?
http://img.tapatalk.com/d/14/07/14/y9y4adyd.jpg

Looks like hair algae

But why only on this coral???
Wouldn't it be all over the aquarium? ??

Don't worry ! Give it time and it will be all over the rest of your tank. Unless something eats it. Or you remove it.

hmm what can eat that ?

It can be a hit-or-miss with trying to find something to eat it, but for me, my tangs devour the stuff. I always bring in random macro algaes on corals and my yellow and purple tangs go to town on it. You probably obtain the hair algae as a hitchhiker on that coral and didn't notice it because it had not taken over yet. A lot of people also use sea hares for larger infestations. I wouldn't recommend one for you though if it's isolated to that one coral.

To be honest, if it were me I would just frag that coral and throw away the major parts that have the hair algae on it. That looks like a green birdsnest which actually grows quite easily, especially from frags so you could make probably a dozen frags out of that mini colony and throw away the parts that have hair algae on them.

i would love to frag it but the problem is i never done it before

lol someone in Coquitlam area can come over and help that would be WICKED :)

It's pretty easy.

1. Go pick up some reef epoxy from a LFS.
2. kneed the epoxy into a ball.
3. Snap off a branch of the coral. Literally, just snap it off with your fingers (ghetto style), or you can use coral cutters (pro style).
4. Insert the snipped off coral fragment/branch into the ball of epoxy.
5. Shove the ball of epoxy onto your live rock.
6. Take pics and post.
7. Sit back and revel in your reefing accomplishment.

Go on YouTube bro. There are lots of vids on how to frag.

Tru dat! This works too.