Ok so I'm planning on setting up a highland Nep terrarium pretty soon and I think I've almost got it all sorted, it's a 30 gallon tank (long) so for those that don't know thats 3ft long, about 16" high and 1ft wide. For humidity I think I'll be spraying every morning and I plan to have a buncha sphagnum moss inbetween pots to help with humidity and make it look nice and natural-ish. And I think after a long long long search I've got some decent lights for my small collection. What I'm now wondering about is how much ventilation it will need. Will it need many holes in the lid? I'm planning on getting a little computer fan to turn on at night but how drastic must the air ventilation be? Thanks a lot for any advice!