The only success story I have heard of was a while ago, some guy (helpful, I know) in Corpus had a tank with a few flowerpot corals as well as a few elegance corals. I don't know what he was doing, but he had them in captivity for something like 6-8 years at the time I talked to him. All I really got out of it was that he said he just kept his water really 'dirty' and the corals thrived.