Look....I know I am just preaching to the choir, but you have got to be patient with this hobby. Your tank has been up for one month and you have already way overloaded that little tank. It looks like your trying to go in the right direction, but you've got to think about the stress you're putting your fish and corals through. You said your ammonia and nitrate are almost zero. That is NOT a good thing. The two things you HAVE to monitor right now is your nitrite and ammonia. Both should be ZERO before you even think about adding fish much less corals. Having a little nitrate in your tank is not necessarily a bad thing. It just means your nitrogen cycle is working. I know it seems like everyone is harping on you, but we have all been where you are and want to see everyone in this hobby succeed. Trust me it is a lot easier to do it right the first time than to try and fix problems later.
Also, can you tell us a little more about your tank? What kind of filtration system are you using?
Just in case you are not fully aware of how the nitrogen cycle works here is a very simple diagram that helps to explain it.