First off thanks for everyone's help so far. Ive asked a few questions and people are quick to respond. Thanks
Now for my next question. I have had my tank up and running for about a week now. I have tested the water twice with the following results:
8/10/09 Ammonia 0, Nitrite 1, Nitrate 4, Ph 8.0, Salinity 1.024, Temp 78
8/13/09 Ammonia 0, Nitrite 1, Nitrate 4, Ph 8.3, Salinity 1.025, Temp 80

When will the ammonia spike happen? I am really confused on the water parameters ( I know what the levels should be) but I want to understand the process and what causes these levels. I am wanting to take my time to make sure I fully understand it all prior to purchasing any fish or corals. I just need some guidance, any will help. Thanks for your time