Hey Bill,
First of all, this forum is awesome! I sent you a PM but I haven't heard back, so I just wanted to state for the record that some of the info about building a terrarium is not good for carnivorous
plants. In the carnivorous
plant link that you put in the forum, it links to how to make a terrarium, but it seems more geared for normal
plants.
Carnivorous
plants need really, really acidic soil, and they need to get their nutrition from the bugs they eat which is why you shouldn't fertilize them. But, if you put a high organic-content soil in there like the link suggests, the
plants will essentially be fertilized! Also I am not sure but I don't think a layer of coal should be in there either - since coal is carbon and carbon is organic, but I'm not positive about that.
Anyway I don't mean to step on anyone's toes, but just so no one makes their
plants sick!!
PS - I have done a lot of research and had great success making terrariums for carnivorous
plants - I even got some advice from a pro who wrote a whole website on them. I can write a really detailed guide on how to make one for the future terrarium-gardeners if you'd want!