Welcome to MAAST

I also switched from freshwater to saltwater about 8 months ago. Best advice for you is to take your time and find a book or two that covers the basics and the different types of setups. Make sure it has been published within the last 5 or 10 years as some of the ones you will find have old information/technology. Books will give you a basic understanding of what is required to get started and what it takes to maintain a saltwater tank. Then you can understand a little better what people are talking about and what things you have questions on. This is a great site to hang out on and ask questions as members are knowledgeable on many different areas and will be glad to help. Also as Tim said, come to a meeting sometime and you can get lots of input!

Good luck, Chris