Leopard Gecko Enclosure Setup: A Complete Beginner Guide
Leopard geckos are one of the easiest reptiles to set up, which is exactly why so many get set up wrong — people assume "easy" means "no rules." It doesn't. Getting the basics right from day one prevents the shedding problems, appetite crashes, and bone issues that send beginners to the vet later. Here's the full setup I use, and the handful of mistakes worth avoiding.
The setup checklist
| Component | What I use |
|---|---|
| Tank size | 20 gallon minimum; 40 gallon for an adult |
| Warm hide | 88-92°F over an under-tank heat mat on a thermostat |
| Cool hide | 72-77°F on the unheated side |
| Moist hide | Damp sphagnum moss inside a hide — the key to clean sheds |
| Substrate | Paper towel (beginners) or tile; no loose sand for juveniles |
| Water dish | Shallow, always available |
| Calcium dish | Small dish of plain calcium powder — leos lick it voluntarily |
| Thermometer | Digital, with the probe at warm-hide level |
The non-negotiables here are the three hides and the heat source. A leopard gecko thermoregulates by moving between temperatures, so it needs a genuine warm side and cool side. And it needs a humid retreat — the moist hide — to shed cleanly. Skip that and you get stuck shed on toes and tail tips, which is the most common beginner problem I see.
The feeding station
Keep your feeders organized and ready. My station holds a protein staple of discoid roach nymphs, silkworms for low-fat days, BSFL for calcium, plus calcium-with-D3 powder and a reptile multivitamin. Discoid roaches are perfect for this because they can't climb smooth-walled bins and they last for months, so you're never scrambling for a feeder. Feed in a shallow dish so insects can't burrow into the substrate and so you can see exactly how much your gecko ate.
Heating: belly heat, not a basking lamp
This is the single most misunderstood part of leo keeping. Leopard geckos are belly-heat animals — in the wild they absorb warmth from sun-baked rock, not from beating overhead sun. Use an under-tank heat mat controlled by a thermostat to hold the warm hide at 88-92°F. An overhead basking lamp alone doesn't deliver heat the way a leo digests with, and an unregulated mat can overheat and burn. The thermostat is not optional.
UVB
Leos are crepuscular — active at dawn and dusk — and were traditionally kept without UVB. The current thinking has shifted: many reptile vets now recommend a low-output UVB bulb for better calcium metabolism and overall health. You don't need the intense T5 high-output setup a bearded dragon uses; a low 5.0 or "shade dweller" lamp is plenty. If you add UVB, you can be a little less aggressive with D3 supplementation, since the gecko makes its own.
Common mistakes
- Heat lamp instead of a heat mat. Leos need belly heat. Use an under-tank mat on a thermostat.
- Loose sand substrate. Impaction risk, especially for juveniles. Stick to paper towel or tile until the gecko is a healthy adult.
- No moist hide. This causes stuck sheds. Always provide a humid hide with damp sphagnum moss.
- Too cold. If the warm hide drops below ~85°F, appetite falls and digestion slows. Check it with a real probe thermometer.
Get the temperatures, the three hides, and a clean feeding routine right, and a leopard gecko is about as forgiving and rewarding as reptile keeping gets.
Once the habitat's dialed in, move on to feeding with my complete leopard gecko diet guide and the reptile calcium and vitamin schedule.
Sources: MSD Veterinary Manual — Housing and Environment for Reptiles · University of Florida IFAS Extension — Reptiles as Pets