Mini Hearth (BF)(Lime 1005) queen ant farm 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

What does add a second side mean

In the event of additional nests being ordered you must choose between the Phalanx nests fitting together side-by-side or  2 or more of them connecting to the foraging area via separate tubing (and then each nest connected via tubing or not at all)

but prepare for your habitats temperature to fluctuate with your room temperatures and provide a buffer against overheating

Mini Hearth (BF)(Lime 1005) queen ant farm I would recommend a medium***This is a Black Friday Cyber Monday Formicarium*** Ready 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