The main tank is a new design for us and is perfect for making it your main nest area.

The tank itself is approx 140mm tall x 180mm long & 60mm deep ventilation is by small holes in the lid (see photo)

I would recommend using an anti climb barrier like PTFE around the top of the unit as small ants may be able to escape

It also comes with a removable cap (see photo).

This can be used as a stand alone unit or you may wish to add or even connect your own ant housing to it.