Hey SPS,
No, they do not need to be feed. They are photosynthetic corals that house Zooanthele and filter feed. That does not mean they can't be feed, it means they do not have to be.
Minced means pulverized, blended, in other words, suspinsion. They are filter feeders. They will take pieces of meat, but, do not need it. There is a diffrence between need and have to have.
Most people use suspinsion. As NM said, DT or some other sort of liquidy food for their corals. I would strongly advise against placing any large food on or around the coral. Espically of fish are in the system. They may go in for the food and end up picking at the coral.
You can direct feed, if so desired, by , again as NM said, using a baster and spraying them.
I raised Candy corals for many years. I found they grew better and were healthier if left alone. Let nature do the work for you.
P.S. I did use DT and a couple other suspinson type foods. Just never directly on them and always did it in the middle of the night.