That algae you're talking about is called "Coraline Algae." To grow this in your tank, you must do several things.
-Dose your tank with calcium (Test for it)
-Keep your Alkalinity up (Test for it)
-Seed your tank with Coraline via liverock
-Buff your tank's PH
It's hard to find a place to even start explaining additives for the tank. Talk to the LFS
about it, and read as much as you can.
I test for
I've noticied that my Coraline grows best when my Calcium and Alkalinity is up. I also use two different products "Coraline Stimulator," and "Purple Up."
Hope this helps, and good luck!