I set up a 30 gallon saltwater aquarium, with 2 T5 HO bulbs. One Actinic and the other 10,000K.?

if it is a high quality fixture and bulbs then you can keep the xenia and GSP along with many nice LPS. You do have a low light level though. Those clams need metal halides, or to be at the top of a tank with lots of t5. Clams really need highly intense lighting.