New empty terrarium, for orchids

[simotricci]

hello all

i make a post for my terrarium.. hope someone can give me some help.
I have this terrarium:
Picasa Web Album - simotricci
the structure you can see here.
glass terrariums explora 80 , explora 80 - FERPLAST
Item lenght 81cm
Item width 36cm
Item height 51cm
And i want make it for my orchids..
What i want is a natural style.. and a good condition for Greenhouse: intermediate - warm.

Now i got only 5 orchids..
i dont have pics now, sorry, but all flower gone..
I have---
Psalaenopsis white, ended flower 2 week ago
Phalaenopsis Elegant selection 58 (never see its flower)
Aerangis luteo-alba var. rhodosticta - with spike
Pahalaenopsis Equestris
Phalaenopsis Mini Mark

But i want more

First i want make a great home for those orchids.

My question is this:

When i put in terrarium my orchids..
i need watering or is enaugh mist?
and... now i make fertilize every 2 week. How i can make fertilize in a terrarium? needed?
Can i make all orchids without a pot?

Now i need to buy something other, like light and a little fan..

I have see one item for light, that make a sunlight simulator.. is necessary or is enaught start-stop light?

ok for now is a lot of question
Hope someone can give me some advice ..

ah! in the end...
i see in this forum a great pics of what i want..
is this but i cant find again post.. sorry.

Now is time to sleep for me
here is 4.00 am

Bye to all and forgive me for my english
Good night

Simona