It is a bit more complicated however once you get started it's well worth it. If you wait to add your fish until the tank has cycled you have much better luck. Adding fish too soon causes New Tank Syndrome and kills off your fish. You need to wait at least a month to add fish unless you use sand that has live bacteria in it live rock also helps then you can add fish in 5 to 7 days depending on your levels. The live rock should be added after your tank has been setup for 24 hours. Some places offer free water testing.