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Gypsum Ant Nest Test Tube 15×150mm, 1 or 5 pack

€8,95 EUR

~~€6,95 EUR~~ €8,95 EUR

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Model Green floor 1 pc Green floor 5 pcs Normal 1 pc Normal 5 pcs

Size 15-150mm

Your queen just started laying, and the last thing you want is a gypsum ant nest test tube that dries out in three days. This 15x150mm plaster-and-sand tube holds moisture for weeks, giving a founding colony the stable, humid microclimate it actually needs to thrive.

No harmful chemicals
Glass + gypsum construction
Ships without live ants

The classic cotton-plug test tube works fine for the first few weeks of a founding setup. But once a queen of Lasius niger (the common black garden ant) starts producing her first workers, that cotton dries faster than you expect, especially if your room runs warm. I burned through a dozen plain glass tubes before I started using plaster-lined ones, and the difference in founding success rate was obvious.

This tube pairs a borosilicate glass shell with a gypsum-and-sand inner layer. The plaster absorbs water slowly and releases it as vapor over days, not hours. The sand mixed into the gypsum roughens the surface slightly, which ants grip better than smooth plaster alone. It is a small detail, but colonies settle in noticeably faster when the texture feels closer to natural soil.

The green-floor variant adds a thin tinted acrylic floor panel that blocks light from below, reducing stress on brood-sensitive species like Camponotus (carpenter ants) and Messor barbarus (the seed-harvesting ant common in Mediterranean regions). If you are running a species that prefers total darkness during founding, that floor panel earns its keep.

Why a gypsum ant nest test tube outperforms plain glass for founding colonies

Weeks of stable humidity from the plaster lining

The gypsum-and-sand wall absorbs a single water charge and releases it slowly, keeping the interior at the 60-80% relative humidity that founding queens need without daily refills.

Textured inner surface ants actually grip

Sand particles embedded in the plaster create micro-ridges that workers and queens navigate confidently, cutting the restless pacing you often see in smooth-walled glass tubes.

Green floor option cuts light stress on brood

The tinted floor panel on the green variant blocks under-lighting, which matters for species like Camponotus that keep brood in the darkest chamber they can find.

5-pack value for multi-colony or backup setups

Running several queens at once, or want a spare ready when nuptial flight season hits? The 5-pack drops the per-tube cost and keeps a buffer on your shelf for the next catch.

Gypsum ant nest test tube specs: materials, size, and what is in the box

	Tube dimensions	15mm diameter x 150mm length
	Shell material	Borosilicate glass
	Inner lining	Gypsum (plaster) + sand blend
	Floor panel (green variant)	Tinted acrylic, light-blocking
	Regulated substances	None
	Box contents	1 or 5 tubes (no live ants included)
	Available packs	1 pc ($9.95) or 5 pcs ($27.95)

How to set up and maintain your gypsum ant nest test tube correctly

Before placing your queen, add 1-2ml of distilled or dechlorinated water along the inner wall. Let it absorb for 30 minutes. The plaster should feel cool and slightly damp to the touch, not wet.
Plug the open end with a cotton ball. This keeps the queen in, lets air circulate, and prevents mold from building up inside the tube during the founding phase.
Keep the tube away from direct sunlight and heat sources. A stable ambient temperature of 24-28C (75-82F) suits most temperate founding queens. For species that hibernate, like Lasius niger, plan to move the tube to a 5-10C (41-50F) location in late October.
Recharge moisture every 2-4 weeks by adding a few drops of water to the plaster wall. Check by pressing a fingertip lightly against the glass: if it feels room-temperature rather than cool, it is time to rehydrate.
If you spot mold (usually white or gray fuzz near the cotton plug), replace the plug immediately and allow the tube to dry slightly before recharging. A small amount of surface mold near the plug is common and manageable; mold spreading to the brood area means the tube is too wet.
Once the colony has 20-50 workers, connect the tube to a formicarium or outworld via flexible tubing. The test tube becomes the nest; the formicarium becomes the foraging zone. Do not rush this transition.

Who this plaster ant test tube nest is made for

This tube is the right call if you just caught your first queen during summer nuptial flight season and want a founding setup that actually holds humidity without babysitting it every day. It also suits experienced keepers running several colonies at once who need reliable, affordable tubes in quantity. Parents setting up a first ant farm for a curious kid will appreciate that the materials list is clean: glass, gypsum, sand, nothing concerning.

It is probably not the right fit if your colony already has 100+ workers and needs a full acrylic or plaster formicarium with separate chambers. At that stage, a single 150mm tube is too small to house the colony comfortably. Check your local regulations before keeping any exotic species not native to your region.

Gypsum ant test tube nest: questions keepers ask before buying

Which ant species work best in a 15x150mm plaster test tube?

This size suits most founding queens of small to medium species: Lasius niger (black garden ant), Formica spp., and early-stage Camponotus (carpenter ant) colonies up to around 30-50 workers. Larger Camponotus colonies or seed-harvesting Messor barbarus colonies will outgrow it faster and should be connected to a larger formicarium once worker count climbs past 40-60. For tiny species like Temnothorax, the 15mm diameter is on the wide side, but it still works.

How long does shipping take, and will the tube arrive intact?

Glass tubes ship with protective packaging to reduce breakage risk in transit. Delivery times vary by destination: typically 7-20 business days for international orders. If a tube arrives cracked, photograph it immediately and contact us through the store so we can sort it out. We ship without live ants, which keeps the package straightforward for customs in most countries.

How long does the gypsum lining actually hold moisture before I need to recharge it?

Under typical indoor conditions (20-25C, moderate ambient humidity), a properly charged plaster lining stays damp for 2-4 weeks. Warmer rooms or drier climates will shorten that window. The glass wall makes it easy to check: condensation on the inside surface means humidity is good; a completely dry interior means it is time to add a few drops of water along the wall.

What is the difference between the green floor variant and the normal version?

The normal version is a standard clear glass tube with a gypsum-and-sand lining. The green floor variant adds a tinted acrylic panel at the base that blocks light coming from below. This matters for species that are sensitive to light during the founding phase, particularly Camponotus and other species that instinctively keep brood in the darkest available spot. If you plan to place the tube on a light-colored surface or under a lamp, the green floor version reduces stress on the queen and brood noticeably. Both variants are otherwise identical in size and materials.