Dendroboard - Here is a great idea for replacing the screen lids that come standard on these tanks with a glass and screen lid to better hold in the humidity.
Converting Exo-Terra Lids for Dart Frogs
On the Web - The screened tops of Exo-Terra enclosures make it difficult to maintain the humidity levels needed by dart frogs. This step-by-step how-to with pictures will show you how to remove the screen and replace it with glass panels, leaving just a strip of screen to allow for some ventilation but retain most of the humidity.@ On the Web