Custom Canyon Foraging Area 7 (9x5x5) Fast formicaria I would recommend a medium

I would recommend a medium sized nest for them because the chambers and tunnels for the Pioneer are larger on average than  some of our other nests

Nestmates - Optional for an increased fee (additional modifications for hydration and ventilation)

***This product comes with a Mini Hearth Formicarium

I'm getting the smaller sp

A Phalanx owner's video of their small Dorymyrmex insanus colony:

Custom Canyon Foraging Area 7 (9x5x5) Fast formicaria I would recommend a mediumThis is a medium foraging area style with raised platforms and other decor fitting of a higher elevation area in the same space. This provides additional surface area for ants to foraging on, and a second level of areas for feeding dishes.