None of the above. Buy a good skimmer, one rated for twice your tank size (they are overrated by the mfr.) Get 4 inches of arragonite based sand and use 1 to 1.5 lbs per gallon of live rock to cycle the tank. When ammonia and nitrite read zero, then you can buy 1 fish, wait till those levels reach zero and stay at zero for a week then pick out another one. Remember, 1 inch of fish for 5 gallons of water, don't overstock and don't overfeed. Get the highest wattage of lighting you can that will fit on the tank. Good luck.