They are one of the superbly beautiful piece mother ocean give us, we manage to get them here in BKK but due to too long transportation we loose all of it, I witness its beauty before we lost it.....
Well, My humble addition here is the general acclimination protocol. Let it rest with good water flow and not bash it under too intense light. Make sure not to shock them with light and not too stress them.
According to the book, BN seems to be in more protected area of the reef, under other coral colonies, and in nooks and overhangs where both lighting and current are lower. IMO They're sensitive to poor water quality more than Acro spcies I assum since the shipment included some Acro were able to made it but BN slought all their tissue. Once establish, they shold be one of the hardy.
GOOD LUCK!