O have several hundred heads and their care isn't hard at all, in a well established azoo system. They can eat everything from phyto to small mysid. I feed mine a wide variety of foods, Cyclopeeze (perfect size), brine, Rod's; finely chopped shrimp, plankton and mysid, etc. I always soak in Selcon or Kent Zoe and once a week mix in Fauna Marin Zoa Powder. I thaw the food I'm going to feed, rinse in rodi on those necessary, soak overnight in the vitamins and fluidize with phyto for uptake in the Sea Squirt (much better than a baster). All pumps are turned off add I cover the colonies with the food. I turn the return pumps back on after about 10 minutes and circulation, once the food is gone (an American DJ strip is perfect for this). Do this once a day, lightly at first, until they're open and looking healthy, and you can then drop to every other day. Don't buy into the hype that they need feed several times a day! I've kept mine for years this way and their numbers double on a regular basis. That much feeding will do them more harm than good, as I'll explain
Now, here's where the hard part comes in. These corals do not tolerate high nitrates. I was able to tell when No3 was starting to climb just by observing my terras. They wouldn't open as much and Wil get worse daily until the nitrates are brought down. As long as you are willing to maintain your water changes to keep them under control, they're relatively easy to keep