ID my Algae

[djorijun]

Not sure what kind this is

[Weetabix7]

Halimeda, although the runner looks like it goes to something different. 

[djorijun]

Any chance you know the best placement and best way to plant this in my Mixed reef tank?  I've never had macro algae and would like to give it a go.

 

Here's a bag with more of 

[Subsea]

https://www.reefcleaners.org/macroalgae-care

 

While at this web site, look up Codium and see what you think.  Depending on enviromental conditions, macro can take differrent shapes and colors.  To truely identify species requires labaratory experience and a microscope.