Elegances are awesome.
This one I've had for almost 3 years.
No special care, just low to moderate flow and medium to high light. I don't feed it directly.
I'm not 100% certain. It was my first ever coral, so I never even knew so much to ask at the time. It was a small frag at the time (June 2015). Reading later led me to believe it's Australian because the skeleton was clearly sawn and healed. It sounds like most Indonesian specimen are 'born' where as most Australian ones are fragged. Not a very definitive answer, sorry.
Here's a photo of it a month after I got it on the same rock as above: