First of all, I'd like to say it's a real pleasure to see your photos.
I successfully started from seed a dionaea in a pot, I would like now to start a terrarium in a tank for other CPs.
From what I learned learning this forum and others, letting the CPs in their pots, it is lot more easy, and allows mixing of plants wo need a dormancy and others.
What do you advise to use as soil in the tank ? Do I have to take the same soil (peat, sphagnum) as if there were plants on it, or anything is OK ?
About the watering: *since pots are half buried, do I have to water plants from top, or overall humidity is enough ?