20G Reef Build

[SeaSerpant]

I know you all will think i'm crazy to start my build a few months before i actually build it but i want to have everything down pat before i do so i don't totally destroy my tank when i do.

Ok here are my plans

20g Aquarium-45.99$
AquaClear 50 Filter-59.99$
Rio Nano Skimmer-49.99$
Visitherm heater 75watt-44.99$
Koralia Pump-49.99$
Salt for a 50g-26.59
Arogonite sand?
Live Rock-Fencer
Lighting?

Fish

2 clowns
RedFire Fish
Longnosed Hawkfish
Magenta Dottyback
Lawnmower Blenny
CUC

Coral

Zoas?
Dusters?
what else?

I don't know are the things with ? obviously.
Any sugestions?