Wait now, don't just go trying another one! Make sure that you know what to look for and have a reputable dealer. Don't support your LFS to sell them unless you know they will survive. Go with a LFS that has a track record of offering healthy elegance, as their distributor probably must have a good supply. Leave the coral at the LFS for a while, if it is going to go down it probably will in the first few weeks. Watch out for shrunken tentacles, puffy oral disk, or mucous production, as those are all signs of the sickness. Before purchasing a recent import, keep an eye out for people taking down their tanks or fragging especially in your area, as long term elegance are best!
Mark