ID this for me please.

[kwaenz]

This brown thing starting to spread around my live rock, their not slimy and somehow can be rubbed off. http://www.aquariumadvice.com/forums/attachment.php?attachmentid=59873&stc=1&d=1320623704

is these type of algae normal to new tanks?
also in the picture there are green spots occuring on my LR too what are those?
Thanks!

 

[Adio800]

Diatoms all new tanks get them it will disappear before you known it!

 

[kwaenz]

Wow thanks! Imma go look what it does.

 

[Adio800]

Just a type of algae!