Prism White is a modular formicarium finished in white, in which a nest module and a foraging arena lock together into a single system measuring 300 x 360 mm overall. It belongs to the partially gypsum category: some chambers are cast with medical-grade G-23 gypsum, while the rest are left dry. This layout works well for keepers of harvester ants, carpenter ants and other species that need both moist and dry areas inside the nest. The 22-chamber module is paired with a tall arena under a double lid, and every assembly screw is made of nylon. Rather than a simple box for insects, it is a carefully planned habitat in which air exchange and escape prevention were considered from the start.

White Finish and Visibility

The light housing looks tidy on a shelf or desk and keeps attention on the ants themselves rather than on the enclosure. The white background is also genuinely practical: leftover food and other debris that workers carry out to the arena stand out immediately, so it is easy to tell when cleaning is due. Everything happening inside the nest remains clearly visible through the transparent top panel, and a clean nest looks especially neat against this backdrop.

Housing Materials

The frame is built from white food-grade PETG plastic. This material is used for the base, for the solid inner layers into which the gypsum is poured, and for the decorative cover plates. Layered acrylic can warp under constant dampness and crack around fixing points, while PLA is sensitive to heat; PETG, by contrast, copes well with moisture and does not swell. According to the manufacturer, the housing can be used together with a heat mat.

What the construction consists of:

• body, inner layers and cover plates: white food-grade PETG;
• top viewing panel: clear food-grade German plexiglass (acrylic), 3 mm thick;
• fasteners: white nylon screws that are not subject to corrosion;
• module-to-arena connection: rigid coupling at four points on each side;
• maintenance: both the arena and the module can be fully taken apart, with parts held by clips and screws.

Metal hardware was left out deliberately: in the humid environment of a formicarium, metal oxidizes, and corrosion products can make their way into the gypsum. Nylon does not rust, so it creates no such risk. The manufacturer also states that all materials are environmentally friendly and safe for living organisms.

Dimensions and Nest Layout

System size:

• fully assembled: 300 x 360 mm;
• nest module: 300 x 180 mm;
• arena: 300 x 180 mm with a height of 165 mm.

Inside the module:

• 22 chambers in total: 10 with gypsum and 12 dry;
• medical-grade G-23 gypsum in a 6 mm layer;
• clearance of 15 mm above the gypsum and 21 mm in the dry chambers;
• two humidification zones;
• six sections divided by partitions;
• configuration: partially gypsum version A.

Microclimate and Ventilation

Humidity in the nest is maintained by the G-23 gypsum: water you add to the two humidification zones soaks into the layer and gradually spreads through the gypsum chambers. For gas exchange, both the module and the arena feature pinpoint laser-cut micro-ventilation. The openings are made so small that air keeps flowing in, while, as the manufacturer intends, even the tiniest workers cannot squeeze through.

If a holiday or business trip is coming up, plan for autonomous humidification in advance. Ant farms with a Water Tower reservoir and various built-in drinkers exist for this purpose; it is best to check whether a particular solution is compatible with Prism White before buying.

Version A and Harvester Stores

In this configuration, 10 of the 22 chambers are filled with gypsum, and the remaining 12 compartments stay completely dry. For Messor keepers this balance is essential: harvester ants move the seeds they collect specifically into dry chambers. There the grain does not get wet, which lowers the risk of it sprouting or developing mold that is dangerous to the whole colony. Meanwhile, the gypsum chambers give the colony a humid zone.

Room for Large Species

The 21 mm height of the dry chambers is designed with genuinely large ants in mind. Carpenter ants of the genus Camponotus struggle to turn around in low, cramped tunnels, whereas here the queen moves freely and calmly tends her brood. According to the manufacturer, the model suits most Camponotus, Messor and Pogonomyrmex species, along with many others.

Arena and Escape Protection

The arena is equipped with a double lid. An anti-escape barrier product is applied to the inner frame, after which the central transparent section can be opened so you can feed the ants using both hands. Together, the barrier coating, the frame and the fine ventilation reduce the chance of workers ending up outside the farm.

Growing the Colony Step by Step

Six partitioned sections let you give the colony exactly as much space as it actually needs at each stage. A young colony gets access to only part of the nest, and as new workers appear you pull out the next plug and open up another section.

A very small founding colony is easier to house first in a compact incubator, such as a mini-module with 10 mm of gypsum. Once the colony has grown stronger, it can be connected to Prism White via the side mounts. The joint is made with a rigid coupling, so the expanded system stays solid and stable as a single unit. The model has already been refined several times, and the manufacturer continues to improve the design.

Who It Suits

Consider this model if you:

• keep Messor harvesters and want dry chambers set aside for seed stores;
• keep large Camponotus that feel cramped in low nests;
• plan to house Pogonomyrmex or another suitable species;
• want to expand the nest gradually as the colony grows.

Frequently Asked Questions

Why choose PETG over acrylic?

Acrylic is fairly brittle and tends to bend after prolonged contact with wet gypsum. PETG is a tough food-grade plastic that absorbs practically no water, so it handles mechanical stress and constant high humidity without developing micro-cracks.

Why are the chambers 21 mm tall?

Many budget formicaria have much lower tunnels. That is too tight for a large Camponotus queen, which cannot turn around properly. The extra height gives the insects freedom for natural behavior and spares the colony unnecessary stress.

How should the six sections be used?

If a young colony is given all 22 chambers at once, the ants will turn the unused compartments into a garbage dump. That is why the module is split into 6 zones with plugs. As the worker count rises, you simply remove one partition, and the nest area expands gradually.

Why are there no metal bolts?

Under elevated humidity, any metal eventually oxidizes. Rust can seep into the gypsum and make the environment unsafe for the ants. White nylon screws neither rust nor rot, so they pose no such threat.