Mini Hearth (Grey 404) Founding 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

"no decor"

so please keep that in mind as you wait on your ants to be mailed

We have raised one of our best Monomorium minimum colonies ever in this formicarium and have several other queens starting out exceptionally well in them

Mini Hearth (Grey 404) Founding formicaria I would recommend a mediumReady for Shipping, this Mini Hearth comes as shown in the photo on this page. 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) Magnetic Ports for Expansion (Additional Mini Hearths Can be Connected On Each Side) Magnetic Glass Panels (Museum Glass optional) 2 Connection ports on each short side, Nestmate Ports in the back (3 8"