Woodland Terrarium Covering
I've been searching through the postings about open/closed terrariums, but it seems that the tropical/semi-tropical terrarium is the most popular variety. I would like to build a cool woodland terrarium in my old 5 gallon aquarium. I've got the substrate materials and I have some (possibly ridiculous) ideas about what kinds of plants I would like (tiny evergreens, ferns, mosses if I can find some). I have a spot to put the aquarium that is bright but not in direct sunlight. My problem is that I don't know whether I will need to cover my terrarium or not. Presumably plants like these don't need high humidity, but perhaps they'd still benefit from a cover? I have a hood for my terrarium that I would use, but it is opaque, and I'm not sure if that will be a problem. I would rather just leave the terrarium uncovered than have to find/construct a translucent cover. In short, then, will my opaque hood be too dark/humid for my woodland plants, and, if so, can I get away without a cover?