I'm working on a 20 gallon long terrarium. It's sort of like a marsh habitat with ferns mosses vines and a 2 inch deep pond/puddle in the center. Any suggestions for maybe some small amphibians that would like it? (The pond has a small air stone to keep the water from becoming stagnant.) Originally I started it for my high humidity plants that needed help and I couldn't save any other way in the dry air inside my house. Such as my tiny cattleya orchid and a fern, and now some bolitis that near died in my aquarium. The orchid and unknown fern are recovering nicely. I am a sucker for mosses and had some vines around the house that are water lovers, so I added them too.