Mini Hearth XL (Light Blue 164)(Vermiculite) 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

Medium/Large tunnels and chambers -  Recommended for Camponotus spp

Dual Stainless Steel micro-screen vents

White Sand/Woodland

These additional magnets (see photos) are in the middle of the formicarium and help to ensure small debris does not filter down in between the glass (not an issue with medium and large ant species) and create smaller gaps for tiny workers to slip through

Mini Hearth XL (Light Blue 164)(Vermiculite) Immediate Shipping Formicaria I would recommend a mediumReady for Immediate Shipping, this Mini Hearth XL comes as shown in the photo on this page. ***Modular Design (for more information click this (link)*** ***VERMICULITE Replacing our normal sand coated interior, this formicarium has a vermiculite interior. To go along with a naturalistic look, Vermiculite has special properties of moisture retention. Vermiculite has been used as an incubation for eggs material for captive breeding of reptiles.(+$5)***