Lair (Black/Red 77) Fortress Pogonomyrmex occidentalis are a medium-sized

Pogonomyrmex occidentalis are a medium-sized ant species so we will make chambers sized for them unless you state otherwise in your comments

The Casita  nest block

Water is then added from outside the habitat so as to avoid disturbing the colony when hydrating your formicarium

Desert Mountain Premium Foraging Decor (+5)

or a single 4x8" foraging area (same size as Nucleus and Hearth)

Lair (Black/Red 77) Fortress Pogonomyrmex occidentalis are a medium-sizedThe Lair formicarium is specifically designed for Myrmecocystus spp. (honey pot ants), a horizontal formicarium where repletes have areas to hang from while being forced closer to the glass surfaces. Any ant species is recommended for the formicarium, which has two water towers . Features: 4x4" nest space Medium and Large Ant Species 2 Water Towers (15 ml capacity) 1 3 8 expansion port for connecting to other habitats foraging areas magnetically