brownish algae?

[justin_tyme]

Hi guys,

some of my Live Rocks are rapidly developing large brownish areas. You can see them in the picture but my camera was too accommodating and gave the thing a nice reddish color. I assure it's much less appealing and browner in reality.

Is this just some good kind of coralline algae or should I get worried? Also is it OK that it spreads so fast (no trace of this just a week ago or so)?

thanks

 

[kidkameleon3]

get a mexican turbo snail, hell clean that right up for you, or a urchin if you dont have corals

 

[IndyReef]

algae ?

I saw this post and i thin i have a picture of this stuff going nuts. just would like confirmation that my problem here is a lack of snails