Mini Hearth (Grey 9019) Immediate Shipping 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

5" Diamater Nest Chamber

Single Chamber w/ Stalactite/rock ceiling and Small Brown Sand Interior

-Museum Glass (+$15)

Museum Glass optional (+8 or +16)

Mini Hearth (Grey 9019) Immediate Shipping Formicaria I would recommend a mediumReady for Immediate Shipping, this Mini Hearth comes as shown in the photo on this page. ***Please Read Below On Pairing This Mini Hearth With Your Ant Bundle*** Nestmates this Mini Hearth comes with a nestmate ($5 value) (See photo). For more information on this feature, watch this video Foraging Area Dcor (as seen in photo) Museum Glass optional ($8) Included with this purchase is a syringe for hydration, Mini Hearth PDF guide, nestmates and