Help ID this red algae?

longreef

New member
Currently, I have problem with this red thin film algae that spread all over might rock for the past couple of months. Friend of mine that have a same algae and he told me that Naso tang will eat these algae but my choice is limited because of my tank size 40g. Is there any other option that can get rid of this algae. Your help is appreciated.

Below is the link for the image.

http://dragonboy.smugmug.com/gallery/3258184#180402617
 
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