Crested Gecko Enclosure Setup: 18x18x24 Minimum
Set up a crested gecko enclosure: 18x18x24 minimum for one adult, 72-78F days, 50-70% humidity, plus substrate, lighting, and bioactive vs simple.
Setting up a crested gecko enclosure correctly from day one prevents most of the common health issues new keepers encounter: dehydration, stuck shed, respiratory infection, heat stress, and failure to thrive. Crested geckos are arboreal (tree-dwelling) geckos from the humid forests of New Caledonia, and their enclosure needs to replicate a warm, humid, vertically oriented environment with plenty of climbing opportunities and hiding spots.
This guide walks through every component of a proper crested gecko enclosure, from choosing the right tank size to deciding between a simple paper towel setup and a full bioactive vivarium.
The most common enclosure for adult crested geckos is a front-opening glass terrarium. Exo Terra and Zoo Med are the two dominant brands. The minimum size for a single adult is 18x18x24 inches (45x45x60 cm). A 24x18x36 inch enclosure is better if you have the space and budget. Height matters more than floor space for an arboreal species. Screen-top aquariums can work but make it harder to maintain humidity in dry climates.
Published 2026-05-05. Updated 2026-10-12.
TL;DR
- Minimum enclosure size for one adult crested gecko: 18x18x24 inches (45x45x60 cm). Bigger is better, especially vertical space.
- Temperature: 72-78F (22-25C) during the day, down to 65-72F (18-22C) at night. Never exceed 82F (28C) or heat stroke is a real risk.
- Humidity: 50-70% during the day, spike to 80-100% after evening misting. Let it dry out between mistings to prevent respiratory infections.
- Bioactive setups (live plants, cleanup crew) are better long-term but cost more upfront. Paper towel substrate works for quarantine and hatchlings.
- Crested geckos are arboreal. Vertical climbing space, branches, and elevated feeding ledges matter more than floor space.
Frequently asked questions
What size tank does a crested gecko need?
An adult crested gecko needs a minimum of 18x18x24 inches (45x45x60 cm). A 24x18x36 tank is better if you have the space. Height matters more than floor space because crested geckos are arboreal and spend most of their time climbing.
Do crested geckos need a heat lamp?
Most crested geckos do not need a heat lamp if your room stays between 72-78F (22-25C) during the day. They cannot tolerate temperatures above 82F. If your room is below 68F, a low-wattage ceramic heat emitter or heat mat controlled by a thermostat is safer than a heat lamp.
What is a bioactive crested gecko enclosure?
A bioactive enclosure uses live plants, a layered substrate with drainage, and a cleanup crew of springtails and isopods to create a self-maintaining ecosystem. The cleanup crew eats mold and waste so you rarely need to change the substrate.
How often should I mist my crested gecko enclosure?
Mist once or twice daily. A heavy misting in the evening spikes humidity to 80-100%. Let the enclosure dry out to 50-70% during the day. This wet-dry cycle is important for preventing respiratory infections.
Do crested geckos need UVB lighting?
Crested geckos can survive without UVB if their diet includes vitamin D3, but low-level UVB (2-5%) provides documented health benefits including better calcium metabolism and more natural behavior. A 12-hour LED light cycle is the minimum.
Can I use a screen-top aquarium for a crested gecko?
You can, but front-opening glass terrariums are much better. Screen tops make it harder to maintain humidity in dry climates, and crested geckos can hang from the screen and injure their toes. If you use a screen top, cover part of it with plastic wrap or acrylic to retain humidity.
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