Depending on the FW fishes you have you could be waiting for some time to switch over. As far at equipment needed for the switch it again depends on the type of SW you'll be setting up. For
FOWLR a regular FW setup would be just fine. But if your going for a reef tank then it's more complicated and more expensive. There are many options however as far as finding your items online. Ebay, Aquabid are just a few where you may find lower cost items. As far as stalking your SW whether with fish or some soft corals you can find a lot on Aquabid, and Nano-Reef.com These are the online options I use besides my
LFS.
Good luck and have fun! Make sure you post pic's of before and after.
