Fortress (Type III)(Bone 275) ant farm the Atrium is larger (in

the Atrium is larger (in terms of available nest space) than the Casita and would be in between the Casita and Nucleus III in terms of nest space

Darkstone (+5)

White Sand Interior/Yellow Exterior

2 levels (or 3 for XL Pioneer) with large chambers

petrified stones

Fortress (Type III)(Bone 275) ant farm the Atrium is larger (inThis product is available for immediate (2 3 business days) shipping. See this fortress link for more information about this formicarium. Features: Bone Exterior White Sand interior Type III material Medium Large species sized chambers Desert Decor Museum Glass Optional 95% glare reduction (Shown in photo) Removable Vent optional What comes in the box? Fortress formicarium (as seen in photos), nestmate, mini liquid feeder, 2 stoppers, connection tube,