Phenom,
...In most situations 50% coverage of the top will not be enough to keep the humidity in the tank. In a cool dry room the warmth of the heater for the cage will create a flue effect where the warm humid air leaves the tank and is replaced by the cooler dryer room air. If you do cover a lot more of the top be careful to monitor temperatures because the heat that has been escaping along with the humidity will not be trapped inside the cage.
Good luck,
Jeff
>>I have a baby male BRB and he's in a 51/2 gallon tank with a large water bowl, curved cork bark with a small dish of damp moss in it. I have also covered half of the tank with clear soran wrap, is this enough to keep the humidity up for this species? Hey Jeff please let me know.