Formicarium Opal
479,90 zł
Low stock
Escape-Proof Design
Stable Humidity System
Find Your Perfect Fit
Clear Viewing
Same-Day Dispatch
Worldwide Shipping
Description
In stock — ready to ship. Year-round shipping with heat & cool packs. DHL across the EU · InPost in Poland · EMS worldwide · Live arrival guaranteed.
Formicarium Opal is a large gypsum ant nest made for moisture-loving species. Its cast-stone walls breathe and hold humidity, giving big ants like Camponotus singularis, Harpegnathos and Myrmecia the deep, stable climate they need. Two watering chambers, three sliding doors and a roomy 20×13 cm arena let a colony grow from a few founders to 400–800 workers.
A premium centrepiece for keepers who want a serious home for a serious colony. Buy your live-ready Opal gypsum formicarium from ANTonTOP.
Additional information
| Dimensions | 32 × 23 × 13 cm |
|---|---|
| Material |
Gypsum |
| Nest area |
20×13 cm |
| Arena |
20 × 13 × 13 cm |
| Colony capacity |
400–800 workers |
| Hydration |
Moisten the plaster |
| Connection port |
⌀ 25 mm |
| Move in from |
20 workers |
Formicarium Opal — a large gypsum nest for humidity-loving colonies
Opal is the big-format member of the ANTonTOP gypsum line. Where acrylic stays dry, cast gypsum behaves like the soil ants dig into underground: it soaks up water and gives it back slowly, so the chambers hold a deep, even humidity for days. That makes Opal a natural home for thirsty, large species that never quite settle in a dry acrylic nest.
Specifications
| Material | Acrylic body with cast-gypsum nest interior |
| Outer dimensions | 32 × 23 × 13 cm |
| Arena | 20 × 13 × 13 cm |
| Chamber height | 15 mm |
| Watering chambers | 2 |
| Sliding doors | 3 |
| Hose ports | 2 × 25 mm |
| Colony capacity | 400–800 ants |
| Recommended start | 3–15 ants (founding colony) |
| Best for | Large, humidity-loving species |
| Difficulty | Beginner-friendly |
Why the Formicarium Opal
Big ants need two things a small acrylic box cannot give them: room and moisture. Opal delivers both. The generous chambers and 20-cm arena leave space for hundreds of workers, brood piles and food, while the gypsum body keeps the air humid without daily misting. It is the nest you buy once and grow into, rather than out of.
Who can live in it
Opal suits large and moisture-loving species: Camponotus singularis, Harpegnathos, Odontomachus, Stigmatomma, Myrmecia and similar. It works from a founding colony all the way up to a mature 400–800-worker nest, so you can settle a young colony now and let it fill the space over time.
Beginner lifehack: match the space to the colony
A small colony in a large nest can struggle to keep the space clean and humid. If you are starting with a queen and a few workers, close off part of the nest (or begin in a tube/arena) and open the chambers as the colony grows. Opal’s sliding doors make this easy.
How the humidity system works
Fill the two watering chambers and the gypsum wicks moisture into the surrounding cells, holding a stable gradient that ants can choose from — damp brood chambers, drier living space. Top the water up every few days; the stone does the rest, with none of the condensation swings you get in sealed acrylic.
Ventilation and mold prevention
Steady airflow through the ports and arena keeps the nest fresh. Avoid over-watering, remove leftover food promptly, and the breathable gypsum stays clean. If a chamber ever looks too wet, leave a waterer empty for a day to let it balance out.
Escape protection
The fitted lid and arena walls keep workers where they belong. For climbing or very small species, a thin band of anti-escape fluid around the arena rim adds extra security.
Assembly
Opal arrives clean and ready. Rinse the gypsum, let it absorb water, connect a hose if you are linking an outworld or tube, and it is ready to populate — no curing chemicals, no fuss.
Arena — sand, decorations, personalisation
The open arena is yours to dress: a layer of sand, a few stones, moss or a small decoration turn it into a foraging landscape and a display piece. Keep the layout light so feeding and cleaning stay easy.
Handy tools and feeding
Pair Opal with a drinking dish, protein and carbohydrate jelly, and soft tweezers for tidy feeding. A 25 mm hose lets you add an extra arena or connect tubes as the colony expands.
Care and cleaning
Gypsum is transparent to work with, sturdy and easy to wipe down. Spot-clean the arena, refresh the water, and the nest looks after itself. Do not force the sliding doors when the colony is active.
Expansion — when and how to grow
When the colony fills Opal, link a second arena or a modular nest through the 25 mm ports. The colony spreads at its own pace and you never have to risk a stressful full move.
Delivery and support
Shipped year-round with heat or cool packs and a live-arrival guarantee — DHL across the EU, InPost in Poland, EMS worldwide. Questions about set-up or species fit? The ANTonTOP team keeps ants too and is glad to help.
Did you know?
Many of the species Opal is built for — like Harpegnathos and Myrmecia — are visual hunters with excellent eyesight, so an open, well-lit arena turns feeding time into a genuinely fascinating show.
Frequently asked questions
Is Opal good for a beginner?
Yes — it is beginner-friendly. Just start a small colony in part of the nest and open it up as they grow.
Why gypsum instead of acrylic?
Gypsum holds humidity naturally, which large, moisture-loving species need; acrylic stays dry and needs more active humidifying.
How often do I add water?
Usually every few days — top up the two watering chambers and let the stone spread the moisture.
Can I connect more space later?
Yes, through the two 25 mm hose ports — add an arena or a modular nest whenever the colony needs room.
Buy your Formicarium Opal — a live-ready large gypsum nest — from ANTonTOP.
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