Sorry for the double post, I wanted to make sure you saw my edits and the stuff below in this post.
This is my first macroalgae besides Chaeto. It is the first time though that I have something in the DT. What else might one suggest if I find this one doing well?
Depends on the size of your tank, and what your goals are.
I like C. Serrulata and C. Prolifera a lot, both are easy, grow decently quick, nice to look at, and aren't invasive.
Blue Scroll is pretty cool.
Ulva is very palatable to fish but I've heard it can be invasive (haven't had that issue though).
Red grape is a good one but my tang and blenny wipe it out before it can get established.
C. Brachypus is one of my favorites, leafy foreground coverage, but grows very fast and can be invasive if you don't keep the runners under control. Really cool looking in tanks with a lot of open sand.
I'll have a big pack of macros (Serrulata, Prolifera, Brachypus, Chaeto, Gracilaria Mammillaris) for sale pretty soon if you're interested.