Hi...new to this forum....but I have a question. Has anyone tried putting their plants in a "stained glass" terrarium? More specifically, a Nepenthes? My concern is that there is lead, and other metals in the composition -- are these plants sensitive to them? I'd love to make a terrarium for my cool (and for now little) plant -- but I don't want it to freak out and die....any advice? I thought about caulking the lead portions with silicon -- would that work, or is that toxic too?