Need advice on macros that a tang would prefer to not eat

[sugartooth]

Hello,
I'm interested in putting some red (hopefully) macros in my anemone tank. So far, I've got Sargassum, shoal grass, and some codium.

I would like to add one red macro that tangs would preferentially not eat. I have seeded other algae in there and am ready to put a small tang in to keep it trimmed. My hope is that the less desireable will be allowed to grow and fill in the tank. This is anemone-clown only tank....plus a tang.

Here is a picture of what I just got, hoping it will fit in. However, after reading a little more, it looks like it may get eaten as well?
It is a red fern algae:

http://farm5.static.flickr.com/4102/4891628233_b2f2ac41b8_b.jpg


Here are the tank's inhabitants:

http://farm5.static.flickr.com/4076/4892227836_1179bc9cb9_b.jpg

http://farm5.static.flickr.com/4102/4891628399_3c8cbda87e_b.jpg


Advice on what red macro that would give some height would be appreciated. I do plan to add some taller live rock in the back for the tang in the future.

Also, I have high flow and high lighting in there if that helps people with their recommendations.

Thanks in advance for your help.

[sugartooth]

push

[tanan]

Whats that fuzzy white stuff ?

[sugartooth]

tanan: it's the same algae that you see in the forefront that is maroon color. Some are lighter.