ILuvHoppers hit the nail right on the head as far as the setup suggestions.

As for newts and toads: do not mix them. Just don't. It is not worth the risk. It is a general rule among all reptiles that you should not mix species, and this is especially stressed with amphibians that excrete toxins. Both may have the name "firebelly" but their toxins are not similar enough for them to be compatible. It is not worth it, and no decent herpentile keeper of any sort would respect that. People get dirty looks for mixing newts and lizards, turtles and anoles. Firebelly toads and newts are a big no-no. There's actually not much "controversy," just ignorant people liking the novelty. I have heard of housing FBTs with certain types of tree lizards, however, as neither ever comes in contact with another and have two entirely different water systems. But that would take a huge investment of time and careful planning as far as setup goes.