The single-chamber Yellow minimodule is designed for a queen and a small ant family during the earliest stage of colony development. This 50×180 mm temporary habitat combines a continuous gypsum base, a transparent body and a separate micro arena. It keeps the founding colony in a compact living space while allowing observation and feeding away from the chamber containing the queen and brood.

One chamber with a full gypsum base

The nesting section consists of one spacious chamber with a continuous 10 mm layer of high-strength G23 gypsum. The material retains water throughout the chamber floor and helps maintain a humid nest environment. This configuration is therefore intended primarily for moisture-loving ants, including tropical and forest species and ponerine ants.

Internal clearance above the gypsum surface is 15 mm. In the area without gypsum, the height is 25 mm. This layout combines a compact nest with a practical service zone without giving a very small family an unnecessarily large internal volume.

Moisture control without a cotton reservoir

A conventional test tube is simple, but it calls for close monitoring. Changes in room temperature can create condensation on the glass, and accumulated water may soak or flood the brood. A permanently damp cotton plug can also sour and develop black mould over time. In this minimodule, the gypsum base serves as the moisture-retaining element, and the condition of the living area can be assessed through the clear body.

Gypsum is not immune to mould. Adding too much water repeatedly can still cause fungal growth, so the module must not be overfilled. Moderate hydration, regular observation and prompt removal of uneaten food remain important parts of routine care.

A dedicated micro arena

The built-in micro arena provides a separate area for feeding and maintenance. Grain, syrup or another diet appropriate to the species can be offered there, after which uneaten material can be removed. The queen and brood remain inside the living chamber while these tasks are performed. The division is particularly useful with active predatory ants that can be difficult to feed in a narrow tube without creating an escape opportunity when the cotton plug is removed.

Diet must still be selected according to the biology of the species. The arena makes access to the feeding zone easier, but it does not make the same food suitable for every kind of ant.

Clear construction and top access

The body combines 3 mm transparent acrylic with impact-resistant PETG. Metal bolts hold the main sections together, while nylon bolts are used in the micro arena. The clear surfaces make it possible to inspect the colony without opening the nest chamber for every routine check.

Access is provided through the top lid. Dedicated slides secure the lid during maintenance, careful handling or an accidental overturn and reduce the likelihood of it opening unexpectedly. The position of every slide and the condition of the fasteners should be checked before the module is moved.

Technical details

• overall dimensions — 50×180 mm;
• living chambers — one;
• nest base — G23 gypsum covering the entire chamber;
• gypsum thickness — 10 mm;
• clearance above the gypsum — 15 mm;
• height without gypsum — 25 mm;
• materials — 3 mm transparent acrylic and PETG;
• fasteners — metal bolts, with nylon bolts in the micro arena;
• access type — top lid;
• closure system — lid slides.

Moving on as the colony grows

The minimodule is intended as temporary accommodation for a queen and a founding family. Its single chamber suits the early period when worker numbers are low and excess nesting space is unnecessary. As the population increases, the available room will eventually become insufficient. At that point the colony should be transferred to a larger partial-gypsum or gypsum formicarium selected according to the species, its size and its humidity requirements.

Frequently asked questions

What practical advantages does it have over a test tube?

The micro arena separates feeding from the living chamber, while the gypsum base retains moisture without relying on a cotton reservoir. This makes servicing more manageable and reduces problems associated with condensation and deteriorating cotton, although regular monitoring is still required.

Which ants is the solid gypsum version intended for?

It is aimed at moisture-loving tropical and forest species, including ponerines, that require hydration across the living zone. The precise moisture level must be chosen for the species being housed.

Can the module be used for transport?

The slides hold the upper lid in position and reduce the chance of accidental opening. Before travel, inspect the slides and bolted joints and ensure that the temperature, ventilation and other transport conditions are suitable for the ants.