The Yellow mini module is a compact starter ant farm intended for the temporary housing of a queen or a young colony. Instead of the confined working space of a glass test tube, it provides two nest chambers and a separate micro-arena for feeding and routine maintenance. Its overall size of 50x180 mm makes it suitable for the early stage of colony development, before the family needs a full-size formicarium.

Moist and dry areas in one module

The defining feature of this version is its partial gypsum fill. A 10 mm block of high-strength medical-grade G23 gypsum occupies only one of the two chambers. The second chamber contains no gypsum and therefore remains the drier section. The ants can select the area they need and arrange brood, pupae and food stores according to their moisture requirements.

This layout is primarily intended for species that do not require uniformly high humidity. Larvae that benefit from a moist substrate can be kept near the hydrated gypsum, while pupae and food can be moved to the dry plastic chamber. For harvester ants, the dry space is useful for seed storage. A similar arrangement may suit steppe Camponotus when the module’s conditions match the needs of the particular colony.

A more convenient start than a test tube

Temperature changes can produce condensation inside a glass incubator. If enough water accumulates, it may reach and flood the brood. Constantly damp cotton also becomes dirty over time and may develop mould. The gypsum module still requires careful water control: repeated overwatering can cause mould here as well. Its advantage is the division of the living area, which gives the colony a dry chamber away from the hydrated base.

The built-in micro-arena also changes how feeding is handled. Food can be placed in the arena without repeatedly opening the nest area or removing a cotton plug close to the queen. This is particularly useful with fast, active ants that readily approach an opening. Portions and leftovers remain visible on the arena, making it easier to monitor feeding and remove waste promptly.

Materials and assembly

The transparent components are made from 3 mm acrylic, while the yellow parts are made from impact-resistant PETG plastic. Metal bolts hold the main structure together, and neat nylon fasteners are used around the micro-arena. The clear walls allow routine observation of the queen, workers and brood without unnecessarily dismantling the housing.

Mechanical sliders secure the lid in its closed position. They reduce the chance of the cover opening accidentally during cleaning, carrying or an unintended overturn. Transport still requires appropriate preparation: all connections should be checked, and the colony must be protected from impacts, excessive moisture and unsuitable temperatures according to the needs of its species.

Technical details

• model: Yellow, two-chamber configuration;
• purpose: temporary housing for a queen or starter colony;
• overall size: 50x180 mm;
• clearance above the gypsum: 15 mm;
• height in the section without gypsum: 25 mm;
• gypsum: high-strength medical-grade G23, 10 mm thick;
• fill layout: partial, with gypsum in one chamber and none in the other;
• body materials: clear 3 mm acrylic and yellow PETG plastic;
• fasteners: metal on the body and nylon in the micro-arena;
• lid closure: mechanical anti-opening sliders.

Care and later relocation

The module is designed for the founding period and is not permanent accommodation for a large, established colony. Hydrate the gypsum section in moderation, taking account of the species and the visible condition of the chamber. Remove food remains, observe cleanliness and monitor both worker numbers and available space. Once the family outgrows the module, it can be moved into a larger gypsum or partially gypsum ant farm.

Questions and answers

Why use two chambers if only one contains gypsum?

The split creates a moist section and a dry section. Ants can keep larvae closer to the hydrated gypsum while placing pupae, seeds or other stores in the unfilled chamber.

Can the gypsum develop mould?

Yes. Excess water and accumulated food debris can create conditions for mould, so hydration should be measured and the living area inspected and cleaned regularly.

Can the colony be transported in this module?

The lid sliders help prevent accidental opening. Before transport, check every connection and prepare temperature, moisture and shock protection appropriate to the ants being carried.