You need salt mix, a source of reverse osmosis/deionized water, sand and about 5 lb of live rock and another 15 lb of base, dry, rock (this saves considerable $$ since the base rock will eventually become live), a hydrometer and an ammonia test kit. Mix the salt in water until the hydrometer indicates 1.025, and the temperature is around 75. Add the rock, then the sand substrate in that order so the rock rests on the tank bottom, not on sand. When this is all set suspend a piece of shrimp in a nylon stocking in the water and measure ammonium daily until until the level reaches 1.0, then remove the shrimp. Continue to measure ammonium until it is at zero, then measure nitrites until those levels also fall to zero. Then you can do a small water change, then begin to add stock slowly.