I have never seen a black sun coral before... very cool!
I have a few spots in my tank just perfect for a sun coral, but, to be frank, I am too lazy to feed them daily!
Detroit's oldest large LED tank! Est'd Jan 2005, went LED June 2009. 6' wide 130g reef, Sunbrite T10 LED tubes (3xGen 3 and 1xGen 1), mostly SPS, but chalices, other LPS, and a few softies too. http://pjr-reef.blogspot.com/
I've had the orange ones for almost a year now. They are extremely healthy... come out during the day to feed. I have them trained to come out during the day. The black ones... they haven't been with me long enough to be trained.
I was so excited to see them open last night. I really thought I may have lost them. Their mouth is super bright green - like a PE. They are actually a dark dark olive green. The skeleton was black before I dipped it. LOL It lost some of it's color, but it looks like it is going back to normal.
What I did with my orange suns is put them in a flowerpot. I have them facing somewhat into the current. This way food gets to them, then kind of swirls and eddies around in the pot so they have plenty to time to reach it. I do sometimes spot feed, but just their positioning alone helps them to get mysis and other foods when I do my normal feedings. I've never taken them out of the tank to feed them. When I do spot feed.. I turn the flow off long enough for them to get food in their tentacles, then right back on. It's a 2 minute process really.
I was told that I wouldn't be able to keep them alive... but shhhhhhh... don't tell them that! They are doing just fine.
I got some better pictures of the black sun corals yesterday. They were actually out during the day / lights on cycle/ I fed them some mysis and coral frenzy.