great job, i dont suppose you took some 'work in progress' Pics ? if you did can you post them up, it may help inspire others to attempt something like this.
They are pretty easy to make. Shape some foam add tile grout, paint and seal with pond tite. Not to difficult as long as you can deal with the mess of the foam. Im making some more so ill keep you posted. There is good instruction on www.dramaticaquascapes.com.
Cheers
Wow they are incredible! They look like something you would see in a display at a zoo! Are they for your own personal collection or are they for a commercial display?
Wow, awesome work. When I have some spare time I might try something like this. Although I doubt I have the creatibity and skills to create something that good.