Atrium (Bone 4156) Fortress ------these 4-level Casitas should be

------these 4-level Casitas should be custom ordered from Type III Formicarium "Casita" Pages- Click Here)

Are they expandable

***Vermiculite Interior***(+15)

Nestmates -For more information on this feature

Atrium (Bone 4156) Fortress ------these 4-level Casitas should beSee More Information About the Atrium at this link. ***MQ Box Museum Quality Acrylic Box Scratch resistant, higher clarity, and magnetically removable lid (+65)*** General Information: *****Due to the size of the open chambers, this formicarium is considered a small to medium sized formicarium and can hold an estimated 1,000 to 2,000 medium sized ants, larger species such as Camponotus, Formica and Myrmecocystus up to 1,000 (again, approximately).