Atrium (Black 4152) Immediate Shipping Formicaria For medium species nest

For medium species nest

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Magnetically removable vent (see photo)

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we will not be able to use this

Atrium (Black 4152) Immediate Shipping Formicaria For medium species nestSee 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