I don't have a water bowl in the enclosure, as Eulamprus are semi aquatic they use the water as do the frogs. (the water is filtered and half changes are made on a regular basis)

At one stage I had Litoria infrafrenata, Eulamprus quoyii, Mixophyes fasciolatus and Wollumbinia lastisternum (Juvs) all together in a 4ft by 2 by 2 tank that worked well.

Cheers,
Scott