Atrium (Red 60) Fortress nest is 3" x 8"

nest is 3" x 8" (75mm x 200mm)

Medium species

***This is the Mini Hearth XL VERSION

Check out our "ready-made" (Immediate Shipping Page) Fallen Fortress and Fortress formicarium here

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Atrium (Red 60) Fortress nest is 3" x 8"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 and Formica 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 would be quite high due to the design. This design is not intended