See quotes below;
"this species does not live in sterile, nutrient-deprived settings... but in the wild in muddy, mucky areas semi-buried in the substrate... sometimes in the shallows of nearshore, other times at the base of reef slopes at depths of 20 meters or more."
"Unlike corals in general and Small Polyp Stonies in particular, Elegance (and other Caryophyllid) Corals require water of less than typical reef system quality. Yes, you read that right, this species is found lying level in/under muddy, shallows of grassy reef flats, with all that go with the setting; low-medium/diffuse light and high organic nutrient concentrations."
"Semi-still waters. They come from settings with actually very little water movement, NOT as many hobbyists place them; in full front of a powerhead’s constant blast. Elegance corals need gentle, non-linear water movement."
"Lighting, full spectrum, low-to medium intensity... provided by VHO or compact fluorescents is fine. These are photosynthetic organisms, but remember, ones that live in turbid, muddy water often shielded by overlying sea grasses (Thalassia). No need for metal halides."
"The need for organic nutrients: IMO, this coral should only be kept in a designated, "species" set-up, in very-well established, fine sand and "mud" substrate, sea grass, high nitrates (tens of ppm and up) are no problem and calcium, strontium... but still no discernible soluble phosphates. With this species you have to take care not to "over"skim, removing bio-useful minerals and trace elements. These essential materials can be replaced through feeding (see below), water changes, and live rock (and possibly sand) use."
"Placement near other stinging-celled life: Don’t. These animals have a wide and deadly stinging ability. In the wild there is a large area around them with no other cnidarians. Keep them this way in captivity."
"I know of many aquarists that periodically feed their Elegance corals, fine to chunky meaty foods... in a well/properly set-up and maintained setting I would abstain from offering purposeful foods. Just rely on photosynthesis... and nutrients that come from other biological activity in the system."
"These animals are being kept in barely to un-tolerable conditions. They don't live in environments like your other corals at all. The places where I've seen them live are more like their wild conditions..."