what to add first?

[Willow]

snails are good they help clean the glass, sandbeds and rocks depending on what type you add.

fish are for looks.

btw if you don't have a copy i recommend you grab the "Conscientious Marine Aquarist " it's a great book that you should probably have for reference.

http://www.jlaquatics.com/phpstore/s...uct_ID=lit-cma