The Complete Leopard Gecko Setup Guide (2026)

Leopard geckos are one of the most rewarding reptiles to keep — hardy, personable, easy to handle, and endlessly entertaining to watch hunt. They are often recommended as "beginner" reptiles, but that label has led to a widespread minimalist approach to their care that leaves many geckos in undersized tanks with outdated heat-mat-only setups and no UVB.

This guide reflects current husbandry best practices for leopard geckos, incorporating the shift toward overhead heating, UVB provision, and enriched enclosures that the reptile-keeping community and veterinary herpetology have been moving toward. A leopard gecko set up this way will display more natural behaviors, eat more reliably, and live a healthier, longer life.

Enclosure Size and Type

Minimum tank size

A single adult leopard gecko needs a minimum 40-gallon breeder tank, which measures 36 × 18 × 18 inches. This is the absolute floor — a 4×2×2-foot enclosure (120 gallons) is the modern recommendation for keepers who want to provide genuine enrichment and a meaningful temperature gradient. The old 10-gallon and 20-gallon long tanks that pet stores bundle in "leopard gecko starter kits" are too small for an adult. A 20-gallon long (30 × 12 × 12 inches) can house a juvenile for the first few months, but upgrade within six months to a year.

Never house multiple leopard geckos together. Males are territorial and will fight. Females may coexist temporarily but can develop chronic stress, compete for resources, and inflict bite injuries without obvious warning signs. One gecko per enclosure is the standard.

Enclosure material

Glass aquariums with a screen top work acceptably for leopard geckos because this species requires lower humidity (30–40%) than ball pythons and many other reptiles, so the screen-top ventilation is less problematic. PVC enclosures retain heat more efficiently and reduce temperature fluctuation, making them the better choice in cold climates or for keepers running multiple enclosures and watching electricity costs. Front-opening enclosures are always preferable — reaching in from above triggers a predator-avoidance instinct in geckos, while front-opening doors allow approach from the gecko's eye level.

Heating: Overhead Is the New Standard

For decades, under-tank heat mats (UTH) were the default leopard gecko heat source. This is changing. The current best-practice recommendation is overhead heating as the primary source, which better replicates how leopard geckos thermoregulate in the wild.

Why overhead heating?

In the wild, leopard geckos bask on sun-warmed rocks during the crepuscular hours. The rock is heated from above by sunlight — infrared-A and infrared-B radiation that penetrate the rock's surface and warm it deeply. The gecko absorbs heat through its belly and through dorsal basking. An under-tank heat mat produces only infrared-C (surface heat from below) and does not warm the air or create the overhead infrared gradient the gecko evolved with.

A halogen flood lamp (25–50W, depending on enclosure size and ambient room temperature) positioned over one end of the enclosure creates a basking zone with a warm rock or slate tile underneath. The basking surface heats to 88–92 °F (31–33 °C), the warm-side air temperature sits around 82–88 °F, and the cool side stays at 73–78 °F. This is the gradient that allows genuine thermoregulatory choice.

Thermostat control

The halogen basking lamp must be connected to a dimming thermostat with the probe positioned on the basking surface. A dimming thermostat adjusts the wattage output smoothly — unlike an on/off thermostat, which would cycle the bulb visibly and shorten its lifespan. Plug-in dimming thermostats designed for reptile use are widely available.

Overnight heat

Leopard geckos tolerate nighttime temperature drops to 65–75 °F (18–24 °C), which is within normal range for most homes. If your home drops below 65 °F at night, add a ceramic heat emitter on a thermostat to the warm side for lightless overnight heating. Do not use colored night bulbs — leopard geckos can see red and blue light, and any visible light at night disrupts their crepuscular activity cycle.

UVB Lighting

Leopard geckos are crepuscular (active at dawn, dusk, and during the night), which led to a long-standing assumption that they do not need UVB. Research from the past decade has overturned that assumption. Studies demonstrate that leopard geckos voluntarily expose themselves to UVB in controlled environments, and individuals with access to UVB show improved calcium metabolism, stronger bones, better coloration, and more natural activity patterns compared to geckos relying solely on dietary D3 supplements.

What to use

A shade-dweller UVB tube — labeled 2.0 (Zoo Med) or 6% (Arcadia) — in a T5 HO reflector fixture. Position the tube so it covers roughly half the enclosure length, allowing the gecko to move in and out of the UV zone voluntarily. Dense hides and cover must be available in the UV-lit area so the gecko is never forced into exposure without escape.

For a 36-inch tank, a 22-inch tube works well. For a 48-inch enclosure, use a 34-inch tube. Mount inside the enclosure or on top of a mesh screen. If over mesh, account for the 30–40% UVB reduction and position the tube closer or use a slightly higher-output tube.

Not optional anymore

While a leopard gecko can survive without UVB if given adequate dietary D3 supplementation, the emerging consensus is that "can survive without" is not the same as "does not benefit from." Providing UVB is increasingly the default recommendation from reptile veterinarians and experienced breeders. Think of it as health insurance — it costs little and provides measurable benefits.

Substrate

Safe options

• Tile or slate: The cleanest option. Easy to wipe, conducts heat well (place under the basking lamp for a warm basking stone), provides a nail-filing surface, and carries zero impaction risk. Natural slate tiles from home improvement stores work perfectly.
• Topsoil-sand mix (70/30): Organic topsoil (no fertilizers or perlite) mixed with washed play sand creates a digging-friendly, naturalistic substrate suitable for healthy adults. Supports a bioactive cleanup crew (springtails, isopods) if you go that route.
• Paper towel or non-adhesive shelf liner: Best for juveniles, quarantine, and monitoring health (you can see droppings clearly). Replace when soiled.
• Excavator clay: Can be sculpted into tunnels and ledges. Good for creating custom basking platforms and naturalistic landscapes.

Substrates to avoid

• Pure sand: Fine, loose sand with no binding soil component poses ingestion risk, especially for juveniles and in enclosures where temperatures are suboptimal (cold geckos digest poorly, increasing impaction risk).
• Calcium sand: Marketed as "digestible" but clumps when wet and can cause blockages.
• Reptile carpet: Catches toenails, harbors bacteria in fiber loops despite washing, and provides no enrichment value.
• Wood chips, bark, or walnut shell: Either too humid for leopard geckos, sharp, or indigestible.

Humidity and Shedding

Leopard geckos thrive at 30–40% ambient humidity — somewhat drier than ball pythons but not bone-dry. Monitor with a digital hygrometer placed on the cool side. Chronic high humidity (above 50%) promotes respiratory infections; chronic low humidity (below 20%) causes stuck sheds.

Humid hide

Every leopard gecko enclosure needs a humid hide — a small enclosed box with a damp substrate (sphagnum moss, paper towel, or coconut coir) that maintains 70–80% humidity inside. Place it on the warm side so the gecko gets both warmth and moisture. The humid hide is critical for shedding — leopard geckos shed their skin in one piece and eat it, and they rely on the humid hide to loosen the skin beforehand. Stuck shed around the toes is the most common shedding complication and can constrict blood flow, causing toe loss. A properly maintained humid hide prevents this.

Check the humid hide daily and re-dampen the substrate as needed. Replace the moss or paper towel weekly to prevent mold growth.

Hides and Décor

Three hides minimum

Leopard geckos need at least three hides:

• Warm hide: On the warm side, near the basking zone. This is where the gecko thermoregulates passively.
• Cool hide: On the cool side for temperature retreat.
• Humid hide: Warm side, filled with damp substrate (described above).

Each hide should be snug — the gecko should be able to press against the walls and ceiling of the hide. A hide that is too large feels exposed and will be avoided, which means the gecko chooses between security and thermoregulation. Providing well-sized hides in each temperature zone eliminates that forced tradeoff.

Enrichment

Leopard geckos are more active and curious than their "pet rock" reputation suggests, especially in enriched enclosures. Add:

• Cork bark tubes and flats: Natural, lightweight, and can be arranged to create tunnels and elevated platforms.
• Rock stacks: Secure them with aquarium-safe silicone so they cannot topple. Flagstone is ideal.
• Low branches: Leopard geckos climb low structures. Grapevine and cork bark branches give them vertical space to use.
• Leaf litter: Dried magnolia or oak leaves scattered over substrate create foraging cover and visual interest.
• Dig box: A container filled with damp topsoil or coconut coir allows burrowing behavior — especially useful for gravid females who need a lay site.

Feeding and Nutrition

Staple feeders

Leopard geckos are insectivores. Primary feeder insects include:

• Dubia roaches: Excellent calcium-to-phosphorus ratio, low fat, high protein. The best all-around feeder for leopard geckos.
• Black soldier fly larvae (Nutrigrubs, Phoenix worms, CalciWorms): High calcium, soft-bodied, easy to digest. One of the few feeders with a naturally balanced Ca:P ratio.
• Crickets: Widely available but escape easily and can bite resting geckos if left in the enclosure. Feed with supervision or use a feeding dish.
• Mealworms: Acceptable as a staple in moderation, but higher in fat and chitin than dubia roaches. Offer in a smooth-sided dish to prevent escape.

Treats and variety

Offer waxworms, silkworms, and hornworms as occasional treats (once or twice a week). Waxworms are high in fat and mildly addictive — some geckos will refuse other feeders after being overfed waxworms. Use sparingly.

Feeding schedule

Juveniles: Feed daily, offering as many appropriately sized insects as the gecko will eat in 15 minutes. Adults: Feed every other day or three times per week. Overfeeding adults causes obesity, which is a genuine health concern in leopard geckos — a healthy adult gecko has a thick tail but should not have visible fat deposits on the belly or legs.

Supplements

• Plain calcium (no D3): Keep a small dish of calcium powder in the enclosure at all times — leopard geckos will self-regulate and lick it as needed. Also dust insects at every feeding.
• Calcium with D3: Dust insects once or twice per week. If you provide UVB, this is supplemental insurance.
• Multivitamin: Dust insects once per week with a reptile-specific multivitamin that includes vitamin A (retinol or retinyl palmitate, not beta-carotene — geckos cannot convert beta-carotene to vitamin A efficiently).

Photoperiod

Run lights for 12 hours on, 12 hours off, using a plug-in timer. Extend to 14/10 in summer and shorten to 10/14 in winter to mimic natural seasonal variation. All lights off at night — no exceptions. Leopard geckos are crepuscular and become most active at dusk when lights go off. Leaving any visible light on at night suppresses their natural behavior.

Complete Setup Checklist

• 40-gallon breeder minimum (4×2×2 preferred)
• Halogen flood basking lamp on dimming thermostat
• T5 HO shade-dweller UVB tube (2.0/6%) covering half the enclosure
• CHE on thermostat for overnight heat (if room drops below 65 °F)
• Infrared temperature gun
• Digital thermometer/hygrometer combo
• Tile, topsoil-sand mix, or paper towel substrate
• Three hides — warm, cool, humid (with damp sphagnum moss)
• Cork bark, branches, and enrichment décor
• Shallow water dish
• Small dish of plain calcium powder (always available)
• Calcium with D3 and multivitamin for weekly dusting
• Plug-in timer
• Feeding tongs and smooth-sided feeding dish

Health Monitoring and Veterinary Care

Leopard geckos are among the hardiest reptile pets, but they are still susceptible to several common conditions when husbandry is suboptimal. Metabolic bone disease from calcium or D3 deficiency manifests as rubbery jaw, kinked tail, trembling limbs, and difficulty walking. Cryptosporidiosis is a parasitic infection that causes progressive weight loss and a characteristic "stick tail" appearance where the tail thins dramatically while the body may still appear normal. Stuck shed on the toes is the most common low-grade health issue — retained shed constricts blood flow and causes toe loss if not addressed within a few days.

Weigh your leopard gecko monthly on a gram-scale. Healthy adult leopard geckos typically weigh 45–80 grams depending on the morph and sex. A gradual decline in weight over weeks or months is an early warning sign of parasites, illness, or husbandry stress that may not be visible to the eye. Track weight in a simple log so you can spot trends.

Find a reptile-experienced veterinarian before you need one — not all exotic-animal vets have reptile-specific training. Annual fecal exams are recommended to screen for internal parasites, especially if the gecko was sourced from a pet store or reptile expo where animals are housed in shared containers.

Handling

Leopard geckos are one of the easiest reptiles to handle — they are docile, rarely bite, and generally tolerate being held. However, respect the animal's boundaries. Scoop the gecko from below with a flat hand rather than grabbing from above (which mimics a predator). Support the body fully. Avoid gripping the tail — leopard geckos can drop their tails as a defense mechanism. The tail regenerates, but the replacement is bulbous and cartilage-based rather than segmented, and it never looks like the original.

Handle for 10–15 minutes at a time, especially when building trust with a new gecko. Let the gecko walk across your hands rather than restraining it. Avoid handling for 48 hours after feeding and for the first 5–7 days after bringing a new gecko home. Babies and juveniles are faster and more skittish than adults — handle over a soft surface in case of unexpected jumps.

Common Mistakes

• Heat mat only, no overhead heat: Misses the natural thermoregulation pathway leopard geckos evolved with. Add a halogen basking lamp.
• No UVB: Survivable but suboptimal. A shade-dweller tube is inexpensive insurance.
• Single hide: Forces the gecko to choose between security and temperature regulation. Provide three hides minimum.
• 10-gallon tank for adults: Too small for meaningful gradients or enrichment. Upgrade to 40-gallon breeder at minimum.
• Dry humid hide: A dried-out humid hide causes stuck sheds. Check daily and remoisten.
• Overfeeding waxworms: Causes obesity and creates picky eaters. Treat only, not a staple.
• No calcium dish: Leopard geckos self-supplement from a calcium dish. It costs nothing and prevents deficiency.
• Cohabitation: Housing multiple leopard geckos together causes stress injuries, resource competition, and tail drops. One per enclosure.