The ANTMART Origin White A 200×200 mm is a partially gypsum-lined formicarium designed for observing Messor and Camponotus colonies. Its white PETG body provides a clear background for viewing workers, larvae, and the internal layout, while the combination of dry and humidified chambers allows the ants to distribute brood, living areas, and food stores according to the colony’s needs.

A moisture gradient within one nest

Variant A does not cover the entire nest with gypsum. Instead, a local insert of high-strength G-23 gypsum, 6 mm thick, humidifies only part of the chamber system. Other areas remain drier. This arrangement is particularly relevant to harvester ants because seeds can be moved away from the humid zone, while brood can occupy chambers offering more suitable moisture.

The result is a gradient rather than the same conditions throughout the nest. Ants can choose between the available zones as the colony develops and its requirements change. The design is primarily intended for Messor structor and various Camponotus species. Ant species requiring exceptionally high humidity across the whole nest may be better suited to a fully gypsum-lined formicarium.

White PETG for a clearer view

The main body is made from chemically inert PETG. According to the source description, this material has no odor and does not react with water. The white surface creates strong visual separation between the interior and its inhabitants, making workers, queens, larvae, and activity inside individual chambers easier to see during routine observation.

The living chambers are 15 mm high. This space accommodates larger Camponotus ants, allowing queens and workers to turn and move through the passages without the restriction associated with shallow chambers measuring 6–8 mm in height. Camponotus japonicus is cited in the source as an example of a larger species for which the chamber height is relevant.

Four sections that open as the colony grows

The nest is divided into four independent sections connected through removable partitions. A young colony can begin with access to a compact area instead of occupying the entire 200×200 mm structure. As the population increases, partitions can be removed one at a time to make additional chambers available.

This modular layout keeps the accessible nest volume in proportion to colony size. It also makes expansion easy to follow: the ants establish themselves in the initial section and receive further space as their numbers and activity increase.

Arena and structural fittings

The arena is 80 mm high and is covered by a double acrylic lid. Latches hold the relevant construction elements in position. White nylon fasteners are used throughout the assembly. Nylon is not subject to rust in a humid formicarium environment, unlike ordinary metal hardware, and its color matches the pale Origin White body.

Species indicated for this configuration

The partially gypsum-lined layout is intended for ants that benefit from access to both a dry storage area and a locally humidified nest zone. The source lists the following species:

• Messor structor, a harvester ant that stores seeds in drier chambers;
• Camponotus nicobarensis;
• Camponotus fedtschenkoi;
• Camponotus pseudoirritans;
• Camponotus japonicus;
• Camponotus maculatus subnudus;
• Myrmicaria brunnea.

This list reflects the recommendations in the supplied material. Before introducing a colony, the design should still be compared with the husbandry requirements of the specific species and the current size of the colony. The Origin White A is not presented as the preferred configuration for species requiring extremely humid conditions throughout the nest.

Construction at a glance

• overall format: 200×200 mm;
• model: ANTMART Origin White, Variant A;
• body material: white PETG;
• humidifying insert: 6 mm G-23 gypsum;
• living chamber height: 15 mm;
• nest layout: 4 independent sections;
• section dividers: removable;
• arena height: 80 mm;
• top cover: double acrylic lid;
• fasteners: white nylon.

Questions and answers

What is the practical purpose of the white body?

The light surface creates a contrasting background for the colony. Small larvae, individual ants, and movement through the chambers are easier to distinguish against it, supporting detailed everyday observation.

Why use partial rather than full gypsum lining for Messor?

Harvester ants store seeds. If every chamber were humidified, the colony would have no comparable dry area for those stores. The local G-23 gypsum insert provides moisture in one part of the nest while leaving other chambers drier for seed storage.

How are the four nest sections used?

They are opened in stages. A small colony starts with limited space; as it grows, a removable partition is taken out and the next section becomes accessible. This avoids giving a young colony the full nest volume immediately.

Why are the fasteners made from nylon?

Nylon does not rust in the humid conditions found around a formicarium. The white fasteners also blend with the overall appearance of the Origin White model.

Does this design provide the same humidity everywhere?

No. Its defining feature is the local gypsum area, which creates a humidified section alongside drier chambers. That distinction is central to the Variant A layout and should be considered when matching the farm to a particular ant species.