Agae ID, please HELP!

[milano07]

Hi everyone,

This brown algae is starting to spread to all the liverock in my tank. I wonder if you guys can help to find out what type of algae this is so I can find the best way to get rid of it. It seems that this type of algae grows around the zoas and does not let them multiply anymore. This algae came on a piece of liverock that I picked up from another reefer.

Here are a couple of pics and hopefully we can ID this stuff.