Leachianus Gecko Enclosure Setup

Leachianus Gecko Enclosure Setup Guide

The Leachianus gecko (Rhacodactylus leachianus), also known as the Leachie or New Caledonian Giant Gecko, is the largest living gecko species in the world. Their size, strength and bold personality mean enclosure requirements differ significantly from smaller New Caledonian species — they need space, robust furniture, and a setup built to last.

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Enclosure Size

Juveniles (up to 6 months): A 30x30x45cm enclosure is fine to start, making monitoring and feeding easier.
Sub-adults (6–12 months): Move up to a minimum of 45x45x60cm.
Adults: A minimum of 60x60x90cm is recommended. Larger is always better — a 60x60x120cm or custom-built enclosure gives the best results for a fully grown Leachie.
Cohabitation: Leachianus geckos are highly territorial and should always be housed alone. Two males will fight seriously. Even a bonded pair requires careful monitoring and ample space.

Enclosure Types

Front-opening glass terrariums — practical and widely available. Look for thick glass and sturdy locks — Leachianus geckos are strong and can force open poorly secured doors.
PVC enclosures — excellent humidity retention, good insulation, and more robust for a large, powerful gecko. Highly recommended for adults.
Custom-built wooden vivariums — can work well if properly sealed and ventilated, but harder to clean and can harbour bacteria if not maintained carefully.
Bioactive setups — excellent for Leachianus geckos. A well-established bioactive vivarium with live plants and a clean-up crew helps maintain humidity, reduces cleaning effort, and provides a stimulating natural environment.

Substrate

A deep, moisture-retaining substrate works well for Leachianus geckos. Coconut fibre, a bioactive mix (topsoil, sand, and coco fibre), or orchid bark with a layer of leaf litter are all suitable. Aim for a substrate depth of at least 5–10cm to allow humidity retention and natural behaviour. Avoid loose dry substrates that do not hold moisture.

Hides and Décor

Leachianus geckos are primarily arboreal but also use ground-level hides. They prefer large, enclosed spaces where they feel completely hidden.

Provide at least one large cork bark tube or hollow log — big enough for the gecko to fit inside comfortably. Leachies are most secure when fully enclosed.
Add thick, sturdy branches at varying heights — Leachianus geckos are heavy and need branches that can take their weight without flexing excessively
Include live or robust artificial plants for cover and humidity
A ground-level hide as well as elevated options gives the gecko choice
Magnetic feeding ledges work well — position at a comfortable height for the gecko to access easily

Ventilation

Leachianus geckos require moderate to high humidity but need good airflow to prevent stagnant, bacteria-prone conditions. A mesh top with partially covered sides, or a PVC enclosure with cross-ventilation, works well. Monitor humidity with a digital hygrometer and adjust misting frequency seasonally.

Cleaning and Maintenance

Spot clean droppings and uneaten food daily — Leachianus geckos produce substantial waste for a gecko
Replace water every 1–2 days
For non-bioactive setups, full substrate changes every 3–6 months
Bioactive setups require minimal intervention once established — top up substrate and monitor the clean-up crew as needed