Welcome to Orchid Board! You will find tons of great information here to help you on your way with your project.
There is a member article with step by step instructions on setting up a natural style orchidarium:
http://www.orchidboard.com/Convertin...to-orchidarium
There are also threads which deal specifically with what people have done with their Exo Terra tanks:
http://www.orchidboard.com/community...ok-plunge.html
http://www.orchidboard.com/community...lunge-too.html
http://www.orchidboard.com/community...nge-three.html
There are also some great threads in the Terrarium section of the forum, on general set up, and many with step by step photos of how people set up orchidariums:
Construction Journal: 40gal Breeder(with pics)
Orchidarium progress
Orchidarium Journal/setup photos included
Some others that I found in a quick search for 'natural' style tanks:
http://www.orchidboard.com/community...ew-member.html
http://www.orchidboard.com/community...age-heavy.html
That should get you started off!! You can also have a look through any of the thread at:
http://www.orchidboard.com/community...ium-gardening/
If you have any more specific questions, there are tons of people here who can help. I found hydroton on-line at a hydroponics shop, and I know that one of our members, Ray (
Welcome to First Rays Orchids) has it available through his website as 'PrimeAgra'. Hopefully those threads will answer some of your other questions and give you lots of inspiration! Anything else, just ask!!