Terrariums are great for humidity loving plants, but being enclosed can produce to much humidity and the plant’s leaves can start to rot. I suggest to open the lids or tops of terrariums at night, then close them up during the day. This keeps them from rotting.
Or if you have one like this which is not sealed tight, you can just place them inside. I found this terrarium at Ikea for about $14.95, the bottom has a metal rack so that the air can flow through.