Crested Gecko Bioactive Setup: Enclosure, Plants, Cleanup Crew

The short version

• A crested gecko (Correlophus ciliatus) lives at room temperature, 72 to 78 F, with no heat lamp and no basking bulb, which is what makes it suit a planted, bioactive enclosure.
• Give one adult an 18x18x24 inch front-opening enclosure stood tall: crested geckos are arboreal and climb far more than they roam the floor.
• Build it in layers over a drainage base, plant it with pothos and other hardy species, then seed springtails and isopods two to four weeks before the gecko goes in.
• The cleanup crew eats waste and mold so you are not tearing the tank down to scrub it. The honest catch is heat: above 80 F a crestie is in danger.

A crested gecko is one of the few reptiles you can keep at room temperature. It wants 72 to 78 F, no heat lamp, and no basking bulb, which is exactly the band a planted enclosure and its cleanup crew also want. That overlap is why the crested gecko is the reptile most people start bioactive with.

Bioactive means the enclosure runs a living cleanup crew in the substrate: springtails and isopods that eat gecko waste, shed skin, dead leaves, and mold, and turn it back into food for the plants. You still mist, feed, and spot-check the tank. What you skip is the monthly substrate teardown a sterile paper-towel setup needs. Here is the build.

What a crested gecko needs from its enclosure

A crested gecko asks for less heat than almost any other reptile: 72 to 78 F, and never above 80 F. Room temperature in most homes covers it, so a heat lamp is not only unnecessary, it is a risk, because it dries the air and can push the tank past 80. Humidity sits at 50 to 80 percent, running high after an evening misting and drying toward the lower end by day.

Height matters more than floor space. Crested geckos are arboreal: they climb branches, cork bark, and broad leaves, and they sleep wedged near the top. An adult reaches about 8 inches nose to tail. Keep one gecko per enclosure, because two males will fight, and a male and female together breed relentlessly, so a single animal is the calm default.

The enclosure: an 18x18x24, opening at the front

The standard is a glass front-opening enclosure, 18 by 18 by 24 inches, stood so the 24 is the height. A front door beats a top-opening tank for a gecko: you reach in at branch level instead of looming down from above like a predator. The screen top vents humidity, which is what you want with a species that needs airflow, not a sealed jar.

That 18x18x24 footprint holds one adult with room for a planted background and a few climbing branches. You can go bigger, and a taller enclosure gives even more vertical run, but 18x18x24 is the honest minimum that still functions like a planted tank rather than a bare box.

The layers, bottom to top

Build the floor in three functional layers so water drains away from the roots and the crew has somewhere to live.

1. Drainage layer, about 2 inches. LECA (clay pebbles) across the bottom holds excess water below the soil so the substrate never sits waterlogged and anaerobic. This is the false bottom.
2. Barrier mesh. A fine mesh screen over the LECA keeps the soil up top and the water below. Skip it and the substrate slowly washes down and clogs the drainage.
3. Substrate, 2 to 3 inches. ABG mix is the standard bioactive vivarium soil: tree fern, sphagnum, charcoal, and bark that drains well and does not compact for years. It holds the plants and houses the cleanup crew.

Cap the substrate with a layer of leaf litter (magnolia, oak, or almond). The leaves are cover for the isopods and the slow food that keeps the crew fed between the gecko's meals. Add cork bark rounds and branches for climbing before the plants go in.

Plants that hold up in a crested gecko viv

Weight the planting toward tough, humidity-tolerant species that shrug off a gecko climbing on them. Golden pothos (Epipremnum aureum) is the workhorse: it grows in low light, tolerates 65 to 85 F and 40 to 90 percent humidity, and its roots strip nitrogen waste out of the substrate fast. One thing worth stating plainly: pothos leaves are toxic if eaten, and while crested geckos browse plants far less than they lick nectar and hunt insects, keep an eye on any animal that nibbles.

Fill in with other hardy species. Creeping fig (Ficus pumila) carpets a background green at 65 to 85 F and takes regular pruning. Broad-leaved plants give a crestie a place to perch and sleep. Keep the heaviest plant mass in the upper two-thirds of the enclosure, where an arboreal gecko actually spends its time, and leave the floor open enough to spot-clean and watch the crew work.

The cleanup crew: springtails and isopods

Two animals do the janitorial work. Springtails (Collembola sp.) are tiny white specks that eat mold, fungus, and decaying matter, and they hold 68 to 82 F and high humidity without complaint. They are the first thing you add to a new viv, because the mold that blooms on fresh wood and substrate is exactly what they clear.

For the isopods, a gecko's heavier waste suits a fast worker. Powder orange isopods (Porcellionides pruinosus) breed and move quickly, clearing waste faster than the smaller dwarf whites, and they run at 68 to 82 F. They stay active on the surface, so a hungry gecko may hunt a few, which is fine: it is free protein. If you want a crew that stays hidden in the substrate, dwarf white isopods (Trichorhina tomentosa) are the quieter alternative at 70 to 82 F.

Seeding the crew, then the gecko

Order matters. Add the springtails and isopods two to four weeks before the gecko, and let them establish in the moist, planted substrate first. A culture seeds the whole viv from a single scoop, and by the time the gecko arrives there is a working crew and the first mold bloom has passed.

Mist to hold humidity at 50 to 80 percent, running higher after an evening misting and drying down by day. Let the plants root in for those same two to four weeks so a climbing gecko does not pull them loose. Then add the one gecko. Feed its prepared diet and insects as normal; the crew handles the waste, not the feeding.

The honest part: heat is what kills them

The failure mode for a crested gecko is heat, not cold. Above 80 F they stress, stop eating, and can die within a day in a hot spell. A summer room that drifts to 84 F, or a heat lamp added out of habit, is the most common way keepers lose one. Watch the enclosure temperature through the hottest part of the year, and cool the room before you ever add heat.

The second failure is a wet tank with no established crew: substrate kept soaking, poor airflow, and mold that spreads faster than anything eats it. The drainage layer, the screen top, and springtails added two to four weeks early are the three things that prevent it. The third is simple: two male crested geckos in one enclosure will fight and injure each other. One gecko per tank is the rule that costs you nothing to follow.

Frequently asked questions

Do crested geckos need a heat lamp in a bioactive setup?

No. A crested gecko does best at 72 to 78 F, which is room temperature in most homes, and it should never exceed 80 F. A heat lamp dries the enclosure and risks overheating a species that has little tolerance for it. If your room drops below about 68 F for long stretches, a low-wattage ambient heat source on a thermostat is the careful fix, not a basking bulb.

How big should a crested gecko enclosure be?

One adult wants an 18 by 18 by 24 inch enclosure stood tall, with the height being the point: crested geckos are arboreal and climb. Bigger is welcome, and a taller enclosure gives more vertical space for branches and plants. A front-opening door makes daily care easier and less stressful for the gecko than reaching in from the top.

Will the cleanup crew hurt my crested gecko?

No. Springtails and isopods are detritivores that eat waste, mold, and dead plant matter, not living animals. A crested gecko may even hunt a few isopods as a snack, which is harmless. The crew's job is to break down gecko waste and leaf litter so the substrate stays healthy for years instead of needing a teardown.

How long before I can add the gecko?

Give the enclosure two to four weeks after planting and seeding the crew. That window lets the springtails and isopods establish, clears the mold bloom that hits new wood and substrate, and lets the plants root in so a climbing gecko does not uproot them. Rushing the gecko in on day one is how you end up with loose plants and an unestablished crew.

Once the crew is working and the plants have rooted, the enclosure mostly holds itself: you mist, feed, and prune, and the substrate does the rest. To size an enclosure and match plants and a cleanup crew to your gecko before you buy anything, run it through the build planner, or read the individual species and their parameters in the compatibility database. For the next builds in the bioactive vivarium guides, see how a paludarium pairs land and water for a crab, how springtails do the mold control in every viv, or step up to a full dart frog vivarium.