I was running the same lights as you on a standard shaped 75 gallon which is about 24" tall. I tried many different corals but the successful ones were: Hammercoral, Candy Cane Coral, Tube Coral (beautiful with only the ACTINIC lights on), bubble coral, Christmas Tree Coral, All Polyps and Mushroooms. These all thrived. I would stay away from Hard corals and Clams. To be honest with you I kept a Blue Crocea Clam for about 1 year before it died, but I would not do it anymore like that. I was lucky that he lived that long. I got him when I first setup the tank and didn't know that they needed much light. Hope this gives you some ideas. I am sure you will get much more input soon from others that have alot more experience then me.