I picked up my first BP at the Expo, a beautiful male pastel, currently setting in in his new tank.
Ive done tons of research and i use aspen, i keep moss in a small container with water in one of the corner of the tank, and also i have two small semi wet towels on top of his tank(20 gal long) and it works great, humidity stays constant around 50% tank temp around 85 ish, and his cold side at around 79 to 82. just my 2 cent. hope it helps.