Just like freshwater..nitrate, nitrite, and ammonia aren't good. But in my opinion the best thing for corals and your tank in general is consistency.
Obviously you can't let the numbers get out of control, but if you have a little nitrate in your tank, and your doing your routine maintenance and everything you'll be okay.
The biggest thing is just to not put any fish in your tank until your ammonia is 0. That you don't ever want to be higher.
What size tank are you setting up, and what are you using for substrate? Live sand, no sand..?
Also, be patient, no one likes having an empty tank with no fish, but like most things, "slow and steady wins the race".
Welcome to the world of reefing, have fun, and don't worry. Having a successful saltwater aquarium isnt as difficult as most people think.
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