Use this guide as a starting point alongside the detailed sources below. Health concerns, unexplained changes in behavior, or feeding problems belong with a reptile veterinarian.
Adult enclosure recommendation
Our recommended minimum: 25.6″ × 17.8″ × 17.8″ (65 × 45 × 45 cm), length × depth × height.
Usable internal space for 1 adult animal. One identified Nephrurus levis up to ≈ 3.937″ (10 cm) snout-to-vent length. N. amyae uses the separate larger profile. Other smooth or rough knob-tailed species require their own evidence review.
Height is the usable internal envelope, including the space reserved for substrate and water. Check the remaining movement space and lamp clearance after installation.
No common preferred tier is supported for these two profiles. More ground space is useful when it supplies additional accessible dry and moist refuges while preserving secure cover for the identified species.
For a ≈ 3.937″ (10 cm) SVL (snout-to-vent length, excluding the tail) smooth gecko, FBH (Federation of British Herpetologists) 6/3/3 gives ≈ 23.7″ × 11.9″ × 11.9″ (60 × 30 × 30 cm). Our ≈ 25.6″ × 17.8″ × 17.8″ (65 × 45 × 45 cm) internal envelope expands floor for separate refuges and allows ≈ 3.937″ (10 cm) sand with ≈ 13.78″ (35 cm) above it. N. amyae at ≈ 5.512″ (14 cm) SVL requires ≈ 33.1″ × 16.6″ × 16.6″ (84 × 42 × 42 cm) before furnishing allowances; our ≈ 35.5″ × 17.8″ × 21.7″ (90 × 45 × 55 cm) profile retains ≈ 17.717″ (45 cm) above ≈ 3.937″ (10 cm) sand. These practical allowances are editorial, not validated thresholds.
Measure snout to vent, excluding tail. Apply 6 × 3 × 3 SVL with no axis below ≈ 11.811″ (30 cm), then retain substrate and equipment clearance; examples ≈ 3.937″ (10 cm) smooth and ≈ 5.512″ (14 cm) amyae are conditional, not a shared adult-size claim.
One N. amyae up to ≈ 5.512″ (14 cm) snout-to-vent length
Our recommended minimum: 35.5″ × 17.8″ × 21.7″ (90 × 45 × 55 cm), length × depth × height. FBH ≈ 33.1″ × 16.6″ × 16.6″ (84 × 42 × 42 cm) calculation, enlarged to retain ≈ 3.937″ (10 cm) substrate and ≈ 17.717″ (45 cm) above-ground envelope.
- Floor space
- Provide ≈ 25.6″ × 17.8″ (65 × 45 cm) for the stated smooth profile or ≈ 35.5″ × 17.8″ (90 × 45 cm) for N. amyae; preserve travel between refuges.
- Climbing space
- Use low stable cork and rocks; do not substitute tall empty space for ground area.
- Substrate
- Smooth species: about ≈ 3.937″ (10 cm) diggable sand/soil, ≈ 13.78″ (35 cm) above it in the ≈ 17.717″ (45 cm) envelope. N. amyae: our ≈ 3.937″ (10 cm) sand allowance with a ≈ 2.756″–3.15″ (7–8 cm) moist-sand refuge and ≈ 17.717″ (45 cm) remaining height.
- Water
- Provide a shallow clean dish and species-appropriate droplets/local moist retreat; a bowl does not replace moisture behavior.
- Security and ventilation
- Secure small gaps, stabilize rocks, thermostat heat and preserve ventilation. Dimensions alone do not establish suitability.
Evidence gaps requiring review:
- Exact UVI (ultraviolet index) and non-breeding night limits are not established across the group by the opened specialist accounts. Named-species commissioning remains necessary, especially outside N. levis and N. amyae.
Meeting these dimensions alone does not establish suitability. Check the usable layout, environmental conditions, equipment clearance and the individual animal’s requirements before occupation.
Identify the gecko before choosing its environment
Record the complete scientific name. N. levis digs in locally moist sand, while N. amyae uses sheltered ground retreats differently. Keep animals individually as our routine recommendation. These profiles do not turn every Nephrurus species into the same care project.
Our recommended adult enclosure
For one identified Nephrurus levis up to ≈ 3.937″ (10 cm) snout-to-vent length, provide ≈ 25.6″ × 17.8″ × 17.8″ (65 × 45 × 45 cm) of usable internal length × depth × height. For N. amyae up to ≈ 5.512″ (14 cm) body length, provide ≈ 35.5″ × 17.8″ × 21.7″ (90 × 45 × 55 cm). The tail is excluded from body length. We apply the FBH 6 × 3 × 3 body-length framework and enlarge it for refuges and substrate; these are our editorial recommendations, not validated cutoffs. No separate preferred numerical target is established. Larger useful floor should improve movement and environmental choice, not simply house more geckos. Juveniles need small secure retreats, small feeder insects and escape-proof gaps within an appropriate gradient.
Digging, retreats and hydration
For N. levis, provide about ≈ 3.937″ (10 cm) of sand or a suitable sand/soil mix, keeping the cool retreat locally moist while leaving dry resting choices. The ≈ 17.717″ (45 cm) total height leaves ≈ 13.78″ (35 cm) above substrate. For N. amyae, our ≈ 3.937″ (10 cm) substrate allowance leaves ≈ 17.717″ (45 cm) above it; include a sheltered bin with 7–8 cm (3 in) of damp sand as described in the specialist account. Stabilize rocks independently. Provide a clean shallow water dish as our precautionary choice, plus droplets and local retreat moisture appropriate to the species. Inspect the dish because digging can bury it.
Heat and lighting by species
For N. levis, begin with warm-side occupied temperatures around 85–90 °F (29–32 °C) and cool-side air around 70–75 °F (21–24 °C). For N. amyae, the recent specialist protocol uses a local basking area around 90 °F (32 °C) and daytime air 75–85 °F (24–30 °C). The accounts do not precisely identify every surface-versus-air measurement, so label warm retreat, basking surface and air probes separately while commissioning. Use thermostatic control, complete shade and a dark night. Low-level UVB (ultraviolet B) with measured output is a reasonable provision, but these sources do not establish an exact UVI or ordinary night limit for every species. Resolve those details for the identified animal; a breeding-cooling schedule is not an ordinary-care night target.
Where recommendations differ
Older rack-based advice offers a 10-gallon tank for every species and discourages overhead light. More recent N. amyae keeping documents larger furnished terraria with UVB and occasional voluntary light use. We favor furnished space and exposure choices while retaining complete shade; nocturnal activity alone does not show that light must be excluded. Likewise, successful group breeding in one N. amyae collection does not demonstrate that shared housing is the best routine choice. Our single-animal recommendation simplifies feeding and condition monitoring. The sources differ in water-dish practice; we retain a shallow dish alongside droplets rather than relying on one route to hydration.
Feed insects and keep disturbance low
Use varied, gut-loaded insects with a calcium and multivitamin schedule coordinated with actual UVB. For adult N. amyae, start around three feeding days weekly; young animals may need five. Established adult N. levis protocols commonly use four or five feeding days weekly. Adjust portions to growth and condition, and remove uneaten insects. Observe from outside when possible, preserving burrows and snug retreats. Record weight, meals and complete sheds. Weakness, swelling, persistent appetite loss, abnormal breathing or retained shed around toes or eyes requires reptile-veterinary assessment. Do not force seasonal cooling without an identified, reviewed purpose and plan.
Sources & further reading
Read the full recommendations and check details for your animal, equipment, and local conditions.
- FBH: Recommended Minimum Enclosure Size
- Steve Sykes: Knob-Tailed Gecko Care Sheet
- Good Life Herps: Nephrurus levis levis
- Frank Payne: Keeping and Breeding Nephrurus amyae
- Birdsville: Smooth Knob-Tailed Gecko
Original Creature Corner guide. Editorial fact and citation checks are recorded; independent veterinary review has not been performed.
