Atrium (Black 4152) Immediate Shipping Formicaria Please use the options to

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For medium species nest

The stalactites seemingly add this behavior

Dual Chamber and Brown Sand Interior w/ stalactites

and much more

Atrium (Black 4152) Immediate Shipping Formicaria Please use the options toSee More Information About the Atrium at this link. 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). While it is quite possible some small species (Lasius spp.) will do quite well in the Atrium, estimating numbers