🏠Housing a Green iguana: 250 × 120 × 200 cm, 35-40°C basking
Green iguana : Adults need an indoor enclosure at least 2 m tall and 2 to 3 m long, often custom-built, with strong UVB, a 35-40 °C basking spot and humidity of 70% or more. Store-bought terrariums only last the first few years.
In short: 1.5 to 2 m including tail as an adult, 15 to 20 years of lifespan, expert level. Cute as a juvenile, it becomes a powerful, sometimes territorial arboreal giant, reserved for experienced keepers. Reaching 1.5 to 2 m, it ultimately needs a room-sized custom enclosure: it is this adult size that makes it unsuitable for most households.
250 × 120 × 200 cm and a strict thermal gradient
For an adult Green iguana: 250 × 120 × 200 cm minimum, with a basking spot at 35-40°C and a cool zone at 26-28°C. That gradient is not comfort: it is how a reptile regulates temperature, by moving. No cool zone means overheating; no hot spot means no digestion.
Heating, UVB, humidity: the technical trio
Heating ALWAYS runs through a thermostat — the least negotiable equipment in herpetoculture — with thermometers at both ends. On light: a UVB tube (10-12 rating for desert setups, 5-7 for tropical) spanning a third of the enclosure, replaced every 6 to 12 months even if it still lights up. Humidity held at 70 to 90% via misting (manual or automated) and the right substrate, checked with a hygrometer, not by feel.
Substrate and layout
A moisture-holding substrate (coco fibre, soil-sphagnum), two hides minimum — one warm, one cool — and a structured background for security. Place the enclosure out of direct sun, which would turn the volume into an oven despite the thermostat.
Frequently asked questions
What enclosure size for a Green iguana?
250 × 120 × 200 cm minimum for an adult — sized for the adult from day one; a juvenile does fine in it with extra hides.
What temperatures for a Green iguana?
Basking spot at 35-40°C, cool zone at 26-28°C, all on a thermostat with a natural night-time drop. Humidity sits at 70 to 90%.
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