Mourning Gecko Enclosure Setup: A Small, Humid, Planted Display Vivarium

Mourning gecko setups look more like a miniature planted terrarium than a typical reptile tank, this is a display colony, not a single-animal enclosure.

Enclosure Size

A 12x12x18 inch, tall, front-opening enclosure works for 2 to 3 adults. Since mourning geckos self-multiply, plan on stepping up: allow about 5 more gallons for every 2 geckos past that, and an 18x18x24 inch enclosure houses a growing colony of up to about 9 adults. Height matters more than floor space for this arboreal species.

Temperature

A daytime ambient temperature of 70 to 80°F with a warm basking spot up to 85°F works well, dropping to 65 to 72°F at night. At normal room temperature, most homes need no dedicated heat source at all. Only add gentle supplemental heat if your room consistently runs cold.

Humidity

Keep ambient humidity at 60 to 70%, with peaks up to 80 to 90% right after daily mistings. Let the enclosure dry back to 50 to 60% before the next misting to prevent mold and respiratory issues, and use a moisture-retentive substrate to hold the baseline between mistings.

Substrate

Coconut coir, or a coir and sphagnum moss blend, works well and supports a bioactive-style setup nicely. Keep it appropriately moist without becoming waterlogged.

Lighting

Low-output UVB (in the 5 to 6% range) is strongly recommended given how frequently females lay eggs and the resulting calcium demand. Run a standard 12-hour light cycle.

The Detail That Matters More Than Almost Anything Else: Escape-Proofing

Before adding any mourning geckos to a new enclosure, seal every gap you can find with aquarium-safe putty or a similar barrier. This single step prevents the most common and most frustrating mourning gecko keeping mistake.

Furnishings

Dense foliage, either live plants (pothos and similar low-light species work well) or artificial, plus cork bark and branches for climbing. Put food dishes at more than one height, because a dominant female may guard a single dish and keep others from eating. Gargoyle geckos are commonly fed the same complete crested gecko diet powder, and the gargoyle gecko setup shows how a much larger species furnishes a similar diet station.

Water: Droplets First

Misting is the water supply. Mist once or twice a day, heavily enough to leave droplets on the leaves and glass, because mourning geckos drink the droplets. Let the enclosure dry back to 50 to 60% before you mist again, or mold and fungus take hold.

A standing dish is optional in a misted, planted enclosure, though some keepers offer one anyway. If you add one, use something very shallow, such as a bottle cap or small lid, sized for a 4 inch adult and an inch-long hatchling.

Eggs and Hatchlings

Adults eat soft fresh eggs, hatchlings and juveniles, so decide early whether the colony will grow. Females glue their eggs to glass, bark and leaves, and prying them loose usually breaks them. Instead, tape a small ventilated plastic cup over each egg, which protects it and catches the roughly 1 inch hatchling when it emerges two to six months later (warmer rooms hatch them sooner).

Move each hatchling into its own grow-out container: a 32 ounce deli cup with damp sphagnum moss, misted twice a day, with the same diet and fruit flies. After about two months, and once it is eating well, it can move up to a larger grow-out enclosure or into a permanent vivarium with the colony.

Cleaning and the Cleanup Crew

Escape is the most common problem with pet mourning geckos, so a bioactive build that needs the door open less often suits this species better than most. Springtails and a small isopod such as dwarf whites, which stay deep in the soil, break down mold, leftover diet and waste in a humid planted tank. Give the crew about a month to establish before the geckos go in, and feed it a little alongside the leaf litter so the population holds. A bioactive still needs droppings on the glass and dishes spot cleaned; the weekly and monthly routine in the reptile hygiene and cleaning schedule applies with the lid open as briefly as possible.

Glass blocks UVB, so the tube has to sit over mesh with nothing solid in between, and it needs replacing on schedule long before it stops looking bright, as the UVB lighting guide explains.

Sources & Further Reading