Good or bad macro

[kdlbem]

<a href="http://communities.msn.com/Bobbys75GallonReef/may32002tankpics.msnw?action=ShowPhoto&PhotoID=32" target="_blank">http://communities.msn.com/Bobbys75GallonReef/may32002tankpics.msnw?action=ShowPhoto&PhotoID=32</a>
Here's a pic of some macroalgae that has started to grow on some LR, has anyone had this particular type? I have heard there are types to avoid.
Here's the closest thing I can find:
<a href="http://saltaquarium.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%2Fwww.globaldialog.com%2F%7Ejrice%2Falgae_page%2Fsargassum.htm" target="_blank">http://saltaquarium.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%2Fwww.globaldialog.com%2F%7Ejrice%2Falgae_page%2Fsargassum.htm</a>
What do you guys and girls think?
Thanks,
B

 

[fshhub]

if i had to guess, i's have to say it were sargassum too, we had it too,and it is not a bad thing at all, it will process nutrients and give the tank color, but unfortunately it normaly does not stick around long, generally about 6 months in most instances

 

[ky]

I had a bunch of that on some new LR that I bought a while ago. My blue leg crabs ate it all in about a week and I haven't seen any since