http://www.nyworms.com/dubiacare.htmWater should be supplied by water gel as it does not get stinky the way sponges will. Using water gel insures against immature roaches accidentally drowning. A dish of water gel also raises the humidity inside the enclosure so that misting the sides of the tanks is not necessary. Blaptica dubia are more tolerant of a lack of moisture, more so than most other species as evidenced by a lack of dying. However, these roaches prefer more moisture than many other species and consequently breed better.