As Kunhardt said this is often a reason for them doing well as they come out of turbid, high nutrient water often. It's also another reason why they were so great in the old days when we only had crap lighting available to us and hadn't developed the great skimmers or techniques for nutrient removal we have today.
And yes I think that the Vietnamese elegance do seem tougher (less over-extended fisheries at this stage). Possibly due to them being far stricter on how much gets removed, by restricting CITES permits I assume, so well done to Vietnam for hopefully protecting their resources better.
So the moral of the story is to have no sump, average lighting and a below average skimmer if you want to keep this coral in your tank
Who would have thought
Otherwise I actually bought this coral from you at Idol Marine. I remember you saying you brought it in from Vietnam thus me assuming it was from that part of the World
