The Focus 23 comes ready for coldwater or temperate species, but you could easily add a heater to make this suitable for tropical fish as well, a 25w heater would be suitable.
The Focus comes as a sharp edge glass aquarium, with a glass plate lid included, as well as bright and energy efficient LED lighting. The aquarium itself measures 30cm x 22cm x 41cm.
The internal filter is sits at the back, and the whole unit is easily accessible from the removable lid. This aquarium is also available in a larger 36l size, and is currently in Black finish, but will have white available too.