What kind of Macro?

[Vette Pro]

I've set up a 150 gal tank with some fish, about 60 # live rock and 60# live sand in the lobby of my shop.
I have a 55 gal tank underneath that's divided into 3 sections. The main tank overflow drops into section 1 that also has a G2 skimmer. It flows over a wall into the center section and over another wall into the 3rd section that has two 800 GPH pumps. I have a couple of baffles to make sure the water flows throughout the center section and not just over the top.
The center section has a bunch of live sand and a little live rock from my old aquarium at home.
I want to grow a bunch of macro algae in this section to export nutrients. What should I get and where? Is this the right way to do this? Do I need anything else?

[karlas]

a common macro alge for a sump would be grape capulera it grows easily and fast. you might be able to get some from a lfs and on most sites under saltwater plants.

http://www.liveaquaria.com/product/s...cfm?pCatId=490

http://www.reeftopia.com/Marine_Plants17826.html

and other sites carry them as well

[RAVEN]

Chaetomorpha (spaghetti algae) and lettuce Ulva algae. The lettuce algae grows fast therefore removing excess nutrients rapidly and it can also be used as a food source. My tangs love it. Check out www.inlandaquatics.com
I bought mine a my LFS. Chaetomorpha is slower growing and both types do not go sexual and pollute your tank.