Can I PLEASE make a suggestion to you. Before you go any further, buy this book and read it from front to back:
Concientious Marine Aquarist
http://www.jlaquatics.com/phpstore/s...uct_ID=lit-cma
It is only $30.00 and will save you a ton of $ in the long run.
You really need to take a step back and do some reading. You are coming at Salt Water with an understanding of Freshwater and that can be dangerous
If you love that book and have a few more $ to spare, then read the following.
The Reef Aquarium Volume 3
http://www.jlaquatics.com/phpstore/s...ct_ID=lit-tra3