Mini Hearth XXL (Beige 1984) queen ant farm and Mini Hearth XXLs have

and Mini Hearth XXLs have these as standard fits to the design

Nest Block Size 4x8x4 inches (100mm x 200mm x 100mm)

I would recommend a medium sized nest for them because the chambers and tunnels for the Pioneer are larger on average than some of our other nests

Maximum Colony Size : Estimated 8

Mini Hearth XXL (Beige 1984) queen ant farm and Mini Hearth XXLs haveFor more information on the Mini Hearth XXL click here. Features: XL Water Tower Single Chamber, Rock Interior Decor, Brown Sand Cast Acrylic Foraging Area (with magnetic lid) 2 Nestmates Magnetic Ports on each short side for attaching other Mini Hearth Modular Units. THA Proprietary Type III material, our hardest nest material. Painted side panels Museum Glass (optional) 3 8" ports on each short end for connecting to other habitats What comes with