I third the advice to do a lot of reading before you spend a dime on anything. There is a good book on setting up a marine aquarium by Michael Paletta. I would also get an atlas of the different fishes that talks about compatibility, maximum size etc. I think this is important in planning your livestock as you would not want to overload your tank. Be prepared to spend quite a bit more money than you imagined on the tank, its occupants and supporting the system. I am waiting for my tank to arrive in a week or so, and since I started my research, based on the advice I have seen in the books and in this excellent forum, have acquired a QT tank, RO
system, getting LR
and all the other maintenance things needed. Also be aware that you will be spending money on a regular basis for salt and food for the fish taken in perspective of maintaining FW
fish. Having had a 55G FW
before, I have found it a very interesting learning experience, but I am excited about it.