Your going to need powerheads and a good lighting fixture. I would recommend leds. If you can afford a $750 light, go with the radion. You could keep any coral, anemone, anything that's photosynthetic. Also, live rock or base rock with some live rock. That's going to be your main biological filtration. Sand also. Test kits, a refractometer, and other things still. Best of luck, be patient, and ask any and all questions you have.