# What Do Leopard Geckos Need in Their Tank? What do leopard geckos need in their tank? At minimum, a leopard gecko needs a secure enclosure with a temperature gradient, at least three hides, a shallow water bowl, and a way to manage humidity. Getting these basics right prevents most of the health problems seen in pet leopard geckos. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - **Enclosure size:** A single adult leopard gecko needs a floor space of at least 36 by 18 inches (a 40-gallon breeder tank works well). Bigger is better, and it makes the heat gradient easier to control. - **Heat:** Provide a warm side with a belly-heat source (under-tank heater or heat mat on a thermostat) and a cool side. Leopard geckos are crepuscular and need a temperature gradient to regulate their body temperature. - **Hides:** Offer at least three: a warm hide, a cool hide, and a humid hide. All three are used regularly, and geckos show strong interest in items that let them hide and climb [1]. - **Water:** A shallow, heavy water bowl that will not tip. Change the water daily. - **Substrate and humidity:** Use a safe solid or loose substrate, and keep the humid hide damp to support shedding. Poor shedding (dysecdysis) is the single most common diagnosis in pet leopard geckos [2]. ## Leopard Gecko Tank Essentials: A Step-by-Step Setup Setting up a leopard gecko tank is not complicated, but the order matters. Build the temperature gradient first, then add hides and furnishings, then fine-tune humidity and lighting. ### Step 1: Choose the right enclosure For one adult leopard gecko, aim for a tank with at least 36 by 18 inches of floor space. A 40-gallon breeder is a common choice. Leopard geckos are terrestrial, so floor space matters more than height. A screen top provides ventilation, but you will need to watch humidity because screen tops let moisture escape. Do leopard geckos need a big tank? They do better in a tank that is large enough to hold a real temperature gradient. A tank that is too small forces the gecko to choose between being too hot and too cold, which stresses the animal. If you keep more than one gecko, house them separately unless you are experienced and prepared for the risks of group housing. ### Step 2: Set up the heat gradient Leopard geckos cannot make their own body heat. They move between warm and cool areas to control their body temperature, a behavior called behavioral thermoregulation [3]. Your job is to give them a range to choose from. Use a heat mat or under-tank heater under one third of the tank floor, connected to a thermostat. This provides belly heat, which helps digestion. The warm side should sit in the low 90s Fahrenheit at the floor surface, and the cool side should stay in the mid 70s. Never guess at these numbers. Use a digital thermometer with a probe or an infrared temperature gun, and check the floor surface, not just the air. A heat lamp can work too, but leopard geckos are most active at dawn and dusk and often prefer belly heat. If you use a lamp, pair it with a thermostat and a timer. For a full breakdown of heat sources, UVB, and day and night cycles, see [Lighting for Leopard Geckos: UVB, Heat, and Photoperiod Explained](/knowledge/veterinary-medicine/reptile-care/lighting-for-leopard-geckos-uvb-heat-and-photoperiod-explained). ### Step 3: Add hides Leopard gecko hides are not optional. They are a core need. Plan for at least three. - **Warm hide:** Placed over the heat mat. This is where your gecko digests food. - **Cool hide:** Placed on the cool side. This is where your gecko retreats when it needs to cool down. - **Humid hide:** A container with damp substrate (such as moist paper towel or sphagnum moss) placed in the middle or on the warm side. Your gecko uses this during shedding. A 2023 study found that geckos kept in low-stimulus enclosures approached enrichment items faster and interacted with them more often than geckos in enriched terrariums, and all geckos showed interest in items that allowed hiding and climbing [1]. In plain terms, hides and climbing objects are things geckos actively seek out. Add a few cork flats, rocks, or branches to give your gecko choices. ### Step 4: Add the water bowl Use a shallow, heavy bowl that will not tip when your gecko walks through it. Leopard geckos often drink by lapping, and some will soak. Change the water daily, and scrub the bowl a few times a week. A dirty water bowl is a common source of bacteria. ### Step 5: Manage humidity and shedding Low humidity and poor shedding go together. Dysecdysis, or difficulty shedding, was the most common diagnosis in a review of 214 leopard geckos, affecting nearly 30 percent of cases [2]. A humid hide is the main tool for preventing this. Keep the moss or paper towel damp but not dripping, and check it every day or two. If your gecko has stuck shed on its toes, tail tip, or around the eyes, do not pick at it. Increase humidity and contact your veterinarian if it does not resolve within a day or two. ### Step 6: Choose a safe substrate For adults, options include paper towel (easy to clean and good for quarantine), tile, or a safe loose substrate such as a soil and sand mix. Avoid calcium sand and crushed walnut shells, which can cause impaction if swallowed. If your gecko is new, sick, or underweight, use paper towel until it is eating and passing stool normally. ## Leopard Gecko Tank Checklist and Maintenance Schedule Use this table as a quick reference. Adjust based on your individual gecko and your veterinarian's advice. | Item | What to provide | How often to check | |---|---|---| | Enclosure | 36 x 18 inches minimum floor space, secure lid | Daily visual check | | Warm side floor temp | Low 90s F, measured at floor level | Daily | | Cool side temp | Mid 70s F | Daily | | Heat source | Heat mat or lamp on a thermostat | Daily | | Warm hide | Over the heat source | Daily | | Cool hide | On the cool side | Daily | | Humid hide | Damp moss or paper towel | Daily, re-moisten as needed | | Water bowl | Shallow, heavy, clean water | Change daily | | Substrate | Paper towel, tile, or safe loose mix | Spot clean daily, full change as needed | | Food and supplements | Insects and calcium or multivitamin powder per your vet | Per feeding schedule | | Weight and body condition | Log weight and appetite | Weekly | | Shedding check | Toes, tail tip, eyes | Every shed cycle | For feeding amounts, insect variety, and supplement schedules, see [Leopard Gecko Diet and Feeding Guide](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-diet). ## Signs Something Is Wrong in the Tank Your gecko's behavior and body tell you whether the setup is working. Watch for these signs. - **Refusing food, weight loss, or lethargy.** These were the most commonly reported problems in a review of leopard gecko medical records [2]. They often point to a husbandry problem such as wrong temperatures. - **Stuck shed on toes, tail, or eyes.** This is the most common diagnosis in pet leopard geckos [2]. It usually means humidity is too low or the humid hide is not damp enough. - **Skin, gastrointestinal, or eye problems.** These three body systems were most affected in diagnosed cases, at roughly 38 percent, 36 percent, and 22 percent respectively [2]. Many of these issues trace back to housing and care. - **Spending all its time on one side of the tank.** This can mean the gradient is wrong. Check floor temperatures with a probe or infrared gun. - **Not using hides or pacing the glass.** This can signal stress, an enclosure that is too small, or temperatures that are off. If you see any of these signs, review the checklist above first, then call your veterinarian if the problem does not improve. ## Common Setup Mistakes New Owners Make Most leopard gecko health problems start with the enclosure. These are the mistakes I see most often. **Guessing at temperatures.** A stick-on thermometer on the tank wall does not measure the floor where your gecko lives. Use a probe or an infrared gun and check the actual surface. **Skipping the thermostat.** An unregulated heat mat can reach temperatures that burn your gecko. Always plug heat sources into a thermostat. **Using one hide.** One hide is not enough. Your gecko needs a warm hide, a cool hide, and a humid hide, plus climbing objects [1]. **Forgetting the humid hide.** Dysecdysis is the most common diagnosis in pet leopard geckos [2], and a dry tank is a leading cause. Keep the humid hide damp. **Using a large water bowl.** A deep bowl raises humidity in the whole tank and can be a drowning risk for small geckos. Use a shallow, heavy dish. **Overcrowding.** Two geckos in a small tank cannot both find the temperature they need. House them separately or provide a much larger enclosure. **Ignoring the cool side.** A tank that is warm everywhere leaves your gecko with no way to cool down. The gradient is the point. ## Supplies and Setup Details That Matter for Health A few details make a real difference in long-term health. **Thermostat and thermometer.** These are not optional. They are the difference between a safe tank and a dangerous one. **Two or three hides plus climbing objects.** Geckos seek out hiding and climbing opportunities, and enrichment items get used [1]. This is not decoration. It is part of the habitat. **A shallow water bowl.** Clean water daily. This is simple and prevents a lot of problems. **A humid hide you can check easily.** Choose a container you can open without tearing apart the tank. **A scale.** Weigh your gecko weekly. Weight loss is one of the earliest signs of a husbandry problem [2]. **A quarantine setup.** New geckos should start on paper towel in a simple tank so you can monitor stool, appetite, and shedding before adding loose substrate. Reptiles are popular pets, but they need specific conditions to stay healthy, and keepers often underestimate how much effort that takes [4]. A leopard gecko tank is not hard to set up, but it does need to be set up correctly. For a broader overview of care, see [Leopard Gecko Care Requirements: A Practical Guide for New Owners](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-care-requirements-a-practical-guide-for-new-owners) and [Leopard Gecko Care Guide for Beginners](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-care). ## Limitations and When to Contact a Veterinarian No article can replace an exam of your specific gecko. Individual cases need a veterinarian who can see the animal, review your setup, and run tests if needed. **Contact an emergency or exotic vet now if you see:** - Open-mouth breathing, gasping, or mucus from the nose or mouth - A prolapse (tissue protruding from the vent) - A burn, wound, or bleeding - Seizures, tremors, or sudden collapse - A gecko that has not eaten for several days and is losing weight fast **Contact your veterinarian the same day if you see:** - Stuck shed around the eyes or on multiple toes - Swollen or closed eyes - Vomiting or diarrhea - A swollen jaw or limbs - Refusing food for more than a few days in an adult, or any missed meals in a juvenile **Schedule a routine visit if:** - Your gecko is new to you and has not had a checkup - You see gradual weight loss or a change in appetite - You are unsure whether your temperatures and humidity are correct - Your gecko has had repeated shedding problems Bring photos of your enclosure and your temperature readings to the appointment. That information helps your veterinarian spot husbandry problems quickly. ## Frequently Asked Questions ### Do leopard geckos need a big tank? Yes, they need enough floor space to create a real temperature gradient. A 36 by 18 inch tank is a reasonable minimum for one adult, and larger is better. A tank that is too small forces your gecko to pick between being too warm and too cool. ### How many hides should a leopard gecko have? At least three: a warm hide, a cool hide, and a humid hide. Geckos actively seek out hiding and climbing items, so adding cork flats, rocks, or branches gives them more choices [1]. More hides reduce stress and give your gecko control over its temperature and humidity. ### What kind of water bowl does a leopard gecko need? A shallow, heavy bowl that will not tip over. Deep bowls raise the humidity in the whole tank and can be a risk for small geckos. Change the water daily and scrub the bowl a few times a week. ### How do I know if my leopard gecko tank is too cold? If your gecko spends all its time on the warm side, refuses food, or seems sluggish, the tank may be too cold. Check the floor temperature on both sides with a probe or infrared gun. The warm side should be in the low 90s Fahrenheit at the surface, and the cool side in the mid 70s. ### What is the most common health problem caused by a bad tank setup? Difficulty shedding, called dysecdysis, is the most common diagnosis in pet leopard geckos, followed by parasites and low vitamin A [2]. Skin, gastrointestinal, and eye problems are the most affected body systems [2]. Most of these trace back to temperature, humidity, and diet problems that you can fix in the enclosure. ## Related Articles - [Leopard Gecko Diet and Feeding Guide](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-diet) - [Leopard Gecko Care Requirements: A Practical Guide for New Owners](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-care-requirements-a-practical-guide-for-new-owners) - [Leopard Gecko Care Guide for Beginners](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-care) - [Lighting for Leopard Geckos: UVB, Heat, and Photoperiod Explained](/knowledge/veterinary-medicine/reptile-care/lighting-for-leopard-geckos-uvb-heat-and-photoperiod-explained) - [Leopard Gecko Care: Pyramiding & Shell Health Management](/knowledge/veterinary-medicine/exotic-small-animals/leopard-gecko-care-pyramiding-shell-health-management) - [Leopard Gecko Morphs Explained for Owners](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-morphs) - [Leopard Gecko Enclosure Setup: Bioactive and Basic](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-enclosure-setup) - [Do Leopard Geckos Drink Water? Hydration Signs](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-drinking-water) - [Leopard Gecko Poop: What's Normal and What's Not](/knowledge/veterinary-medicine/reptile-care/leopard-gecko-poop-guide) ## References 1. [The Effect of Enrichment on Leopard Geckos (Eublepharis macularius) Housed in Two Different Maintenance Systems (Rack System vs. Terrarium)](https://pubmed.ncbi.nlm.nih.gov/36978651/). Animals : an open access journal from MDPI, 2023. 2. [Husbandry factors are associated with skin, gastrointestinal and ophthalmic disorders in leopard geckos (Eublepharis macularius)](https://pubmed.ncbi.nlm.nih.gov/42535492/). The Veterinary record, 2026. 3. [Thermal biology characteristics of the Caspian whipsnake (Dolichophis caspius, Gmelin, 1789) under natural and laboratory conditions](https://pubmed.ncbi.nlm.nih.gov/42720782/). Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology, 2026. 4. [Keeping reptiles as pets in Brazil: keepers' motivations and husbandry practices](https://pubmed.ncbi.nlm.nih.gov/37865770/). Journal of ethnobiology and ethnomedicine, 2023. ## Further Reading - [Merck Veterinary Manual: Reptiles](https://www.merckvetmanual.com/all-other-pets/reptiles)