What enclosure setup do I need for two adult crested geckos?
Use a 20‑gallon (75L) screen enclosure to meet the space needs of two adult crested geckos, providing at least 4sqft of floor area and 24inches of height.
Space requirement
A 20‑gallon (75L) screen cage measures roughly 24in×24in×24in, giving you about 4sqft of usable floor. Two adults, each 7–10inches long, need enough room to climb without constantly bumping into each other, so aim for at least 2ft of linear branch length per gecko. The extra vertical space also helps maintain the 72–80°F (22–27°C) temperature range without a heat lamp.
If you can fit a 30‑gallon (115L) unit, you gain an extra foot of horizontal space and can place more foliage, which improves humidity stability. Keep the enclosure away from direct drafts and windows that swing more than 5°F (3°C) in a day, because sudden drops push humidity below the 50% target. A larger footprint also reduces the frequency of full‑clean cycles from every 4weeks to every 6weeks.
Choosing and preparing the enclosure
Select a screen top with 1‑mm mesh to ensure airflow while preventing escape. Measure the opening of your cabinet or stand; the cage should sit flush with a 2‑inch clearance on all sides for easy access. Install a silicone seal around the base if you plan to use a water‑drip system, which helps keep humidity between 50–70%.
Before adding any décor, place a calibrated digital thermometer and a hygrometer in opposite corners for at least 24hours. Adjust the room temperature with a small 50‑watt ceramic heater if the ambient drops below 68°F (20°C) during winter nights. Once the readings stabilize within the 72–80°F range, you can move on to the next step.
Adding cover, branches, and essentials
Start with a 2‑inch thick cork bark slab on one side; it acts as a natural hide and helps retain moisture. Position a 12‑inch live‑oak branch at a 45‑degree angle from the bark to create a climbing ramp that mimics a tree trunk. Add a few 6‑inch artificial vines across the top to give the geckos vertical pathways and to break up line‑of‑sight stress.
Place a shallow 2‑cup (500ml) water dish on the lower left corner; mist the enclosure with a spray bottle for 5‑second bursts three times a day to reach 60% humidity, then let it settle to about 50% before the next mist. A 1‑inch thick coconut fiber substrate works well for egg‑laying and burrowing, but keep it no deeper than 1inch to avoid excess mold growth. Finally, attach a small 3‑inch PVC pipe as a night‑time hide; geckos love a dark, tight space for stress relief.
Day‑one checklist
Before you introduce the geckos, run a final 12‑hour test of temperature, humidity, and ventilation. Verify that the thermometer reads between 72 and 80°F and the hygrometer stays within 50–70% after a misting cycle. Check that all branches are secure; give each a firm wiggle to ensure it won’t snap under a 0.5‑lb (225‑g) gecko.
Once the environment passes, you’re ready to move the animals in. Keep a notebook handy to log the first week’s readings every 12hours; this helps you spot any drift before it becomes a problem.
- Thermometer and hygrometer calibrated
- Secure branches and hides
- Water dish filled and misting schedule set
- Substrate spread to 1‑inch depth
- Cover placed and ventilation checked
Common setup mistakes
Most owners over‑humidify by misting every hour, which pushes humidity above 80% and encourages mold on bark and substrate. Limit misting to three 5‑second sprays per day and monitor the hygrometer; adjust by reducing spray time by 1‑second if readings stay high. Another frequent error is using glass tanks; they trap heat and can raise temperatures to 85°F (29°C) without a thermostat, stressing the geckos.
Skipping the initial 24‑hour stability test is a shortcut that leads to hidden temperature spikes or drafts. Also, placing the enclosure directly on a cold floor can cause the bottom half to stay below 68°F, creating a micro‑climate where humidity spikes and the geckos become lethargic. Use a 0.5‑inch cork mat under the cage to insulate and keep the floor temperature even.
- Misting too often – keep to three 5‑second sprays daily
- Using glass tanks without a thermostat – stay with screen tops
- Skipping the 24‑hour stability test – always run it first
Keep reading about Crested Gecko: Crested Gecko care sheet
Related questions
How often should I mist the enclosure?
Mist three times a day with 5‑second bursts; this keeps humidity at 60% after misting and around 50% by the next cycle.
Do I need a heat lamp for crested geckos?
No heat lamp is required if room temperature stays between 72 and 80°F (22–27°C). A small 50‑watt ceramic heater can be used only during winter nights when ambient drops below 68°F.
What substrate depth is safe?
Lay coconut fiber to a depth of 1inch (2.5cm); deeper layers retain excess moisture and can cause mold, while shallower beds make egg‑laying difficult.
Not veterinary advice. This guide covers husbandry — housing, feeding, cleaning and handling. If your crested gecko is injured, off food unusually long, or behaving abnormally, contact a veterinarian.