Found some info about ducan's and thought I'd share the link
http://www.liveaquaria.com/product/p...70&pcatid=2670
This info stood out to me:
"In the home aquarium, place in low current areas with low to moderate light."
"Though they feed through photosynthesis via the symbiotic algae zooxanthellae that thrive on the colony, this coral also benefits from regular target feedings of meaty marine foods such as enriched mysis and brine shrimp."