What miscellaneos items do i need now?

[dekay]

Decided to not go with MH, cuz I'll be happy with soft corals and LPS. Besides, I don't really want to build a rack. So I've somewhat decided on my equipment list now.

Equipment I already have:
46 gallon bow front tank w/ stand (L=36inch, D=18inch, W=12inch)
Heater

Equipment I'm getting:
4x55w Power Compacts
Prism Pro Deluxe Protein Skimmer
2x Maxjiet 1200
DI Filter

I know I'll still need live rock and live sand. But what else do I need?
-kalkwasser
-ph buffer
-food for the corals

Can you guys gimme a list of essentials and some optional chemicals or what not that I'll need? Including the brand name and their purpose would be helpful too, and if you'll throw in an approx amount (xxx grams etc.) that you think I'll need for my relatively small tank, then you'll be a superstar at least on my list . Thanks for helping a noob out.