I wouldn't put the two species together its not a good idea. Also I don't think either species will survive semi-aquatic set-up as they are not good swimmers. The tank you describe would be good for Ranids, such as leopard, pickerel, or American bullfrogs. It would also be good for fire-bellied toads who are also semi-aquatic. If good ventalation is provided then treefrogs can also work. Just keep it to a single species tank.