Neon Day Gecko (Phelsuma klemmeri) Care Sheet

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Quick Facts

Scientific Name: Phelsuma klemmeri
Common Names: Neon Day Gecko
Origin: Madagascar
Adult Size: 10–12 cm (4–5 inches) total length
Lifespan: 6–10 years in captivity
Sex Differences: Males are slightly larger, with brighter colours and visible hemipenal bulges; females are smaller and slightly duller in coloration
Beginner Suitability: Moderate – small, active geckos that require precise temperature, humidity, and diet

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Enclosure

Size: A pair or small group can be housed in a vertical enclosure measuring 30 cm x 30 cm x 45 cm (12 x 12 x 18 inches). Larger enclosures are preferred to allow climbing and enrichment. Juveniles can be housed in smaller enclosures initially but must be upgraded as they grow.

Substrate: Use moisture-retaining substrates such as coconut fibre, orchid bark, or bioactive soil. Avoid sand or loose substrates that may cause impaction.

Hides: Provide multiple hiding spots and vertical climbing surfaces using live or artificial plants, cork bark, or leaf litter. Include basking spots at different heights.

Heating: Maintain a hot spot of 28–30°C and a cooler side of 22–24°C. Night temperatures can safely drop to 20–22°C. Use ceramic heat emitters or low-wattage heat bulbs regulated with a thermostat.

Lighting: Provide full-spectrum lighting and low-level UVB (2–5%) to promote health and natural behaviour. Maintain a 12-hour light / 12-hour dark cycle.

Humidity: Maintain 60–80% humidity. Mist daily or provide automated misting. Ensure proper ventilation to prevent mould.

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Diet

Primary Diet Type: Omnivore

Food Items: Feed small insects such as fruit flies, pinhead crickets, and small roaches. Supplement with pureed fruit, commercial gecko diet powders, or nectar solutions. Juveniles require higher protein intake.

Feeding Frequency: Juveniles daily; adults every 1–2 days. Dust insects with calcium at every feeding and a multivitamin supplement once per week.

Feeding Troubleshooting: Ensure insects are appropriately sized. Offer variety to encourage feeding. Remove uneaten food to prevent stress or mould.

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Water

Provide a shallow water dish with fresh water. Frogs and geckos may also drink droplets from misted surfaces.

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Behavior And Handling

Neon Day Geckos are active and fast-moving. They can be skittish, so handle gently and support the full body. They are best kept in compatible pairs or small groups with careful monitoring.

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Enrichment

Include branches, plants, and vertical climbing surfaces. Provide hiding spots at multiple heights. Rearrange décor occasionally to encourage exploration and natural behaviours.

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Health

Signs of illness include lethargy, refusal to eat, abnormal stool, retained shed, or swelling. Maintain proper temperature, humidity, and diet. Consult a reptile-specialist veterinarian if issues persist.

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Lifespan

Typically 6–10 years in captivity with proper care.

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Legality In The UK

Neon Day Geckos are legal to keep in the UK. No licence is required for private ownership. Owners must comply with Welfare of Animals regulations.

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Difficulty Bars (Relative)