November 3, 2026 · Matt J

How to Build a Bioactive Leopard Gecko Enclosure (Semi-Arid Setup)

Quick answer: For an adult leopard gecko, use an enclosure of at least 90 × 45 × 45 cm. Fill it with 10–15 cm of a semi-arid bioactive soil like Jurassic ABG Semi-Arid Blend, with no drainage layer. Add a warm hide, a cool hide and a humid hide, a flat basking stone under an overhead heat source, mopani or grapewood for climbing, hardy succulents in the cool end, and an arid-tolerant clean-up crew.

Why bioactive suits leopard geckos

Leopard geckos (Eublepharis macularius) come from rocky, semi-arid grasslands and scrub in Pakistan, Afghanistan, India and Iran. Not sand dunes, contrary to popular belief. Their natural ground is firm, compacted soil with rocks, sparse plants and burrows that stay more humid underground. A semi-arid bioactive setup recreates that. It encourages digging, climbing and exploring, and lets the clean-up crew deal with waste.

Leopard gecko parameters

Parameter	Target
Enclosure (adult)	90 × 45 × 45 cm minimum; larger is better
Basking surface	~32–35°C
Warm side air	~27–30°C
Cool side	~22–25°C
Night	Can drop to ~18–21°C
Humidity	30–40% ambient, with a humid hide at 70%+
Lighting	Day/night cycle; low-level UVB widely recommended

Shopping list (90 × 45 × 45 cm)

~45–60 L Jurassic ABG Semi-Arid Blend (10–15 cm deep). Canadian-made by Jurassic Reptile Products.
Optional: Canyon Sand mixed in for a firmer surface
Mopani wood or sandblasted grapewood
Flat basking stone: Carnelian or Red Zebra stone
Cork partial rounds or cork flats for hides
Terrarium moss or sphagnum for the humid hide
Leaf litter for the cool corner: eastern oak or mini oak
Arid isopods and springtails
Succulents (see below)

Calculate exact litres with our substrate calculator.

Step 1: Heavy hardscape first

Leopard geckos dig, so stones must sit on the enclosure floor before any soil goes in:

Place a large flat stone at the warm end, under where your heat source will go. Raise it on smaller stones to make a cave beneath.
Silicone any stacked stones together.
Set the base of mopani or grapewood pieces on the floor too, so they won't topple when burrowed under.

See using rocks and stone safely and hardscape design.

Step 2: Add the soil

Skip the drainage layer. Desert builds are watered infrequently. Moisten the semi-arid soil lightly and add 10–15 cm, packing it gently so tunnels hold their shape. Slope it higher at the back. Deep soil lets the bottom layer stay slightly moist, which supports the clean-up crew and plant roots, while the surface stays dry. See when to skip drainage.

Step 3: Three hides

Warm hide: the cave under the basking stone, or a cork round at the warm end.
Cool hide: a cork flat or round at the cool end.
Humid hide: an enclosed hide filled with damp moss, placed mid-way. This is essential for healthy shedding, especially in dry Canadian winters.

Step 4: Plants

Plant in the cooler half, away from the heat:

Haworthia and Gasteria (very tough, tolerate partial shade)
Small Aloe species (spineless types)
Dwarf snake plant ('Hahnii')
Elephant bush (Portulacaria afra)

Protect new plants with stones around their base. More: best desert and semi-arid plants.

Step 5: Clean-up crew

Choose isopods that tolerate drier conditions, like Porcellionides pruinosus (powder orange or blue) or Armadillidium species. Keep a small patch of leaf litter and a lightly moistened area in the cool corner, plus the humid hide, so they have refuge. Add springtails to the moist lower layers. See clean-up crew guide.

Step 6: Heat and lighting

Use an overhead heat source (halogen or deep heat projector) controlled by a thermostat. Overhead heating mimics the sun and warms the basking stone.
Measure basking surface temperature with an infrared thermometer.
Add a UVB tube with a shade gradient, and a plant LED if you have succulents.
Use timers for a consistent day/night cycle.

Step 7: Watering

Every 1–2 weeks, pour water down into the soil around plants and in the cool corner so it reaches the lower layers. Keep the humid hide moss damp. The surface should remain mostly dry. Provide a shallow water dish at all times.

Step 8: Grow-in

Let it run for 2–4 weeks before adding your gecko. See grow-in guide.

Is loose substrate safe for leopard geckos?

Impaction concerns usually stem from inappropriate substrates (e.g. pure calcium sand), dehydration, or improper temperatures that impair digestion. Healthy, properly heated geckos on a naturalistic soil-sand mix are widely kept in bioactive setups. Feed insects from a dish or with tongs if you're concerned, and keep heat and hydration correct.