Red-eared Slider Turtle

The Red-eared Slider Turtle (*Trachemys scripta elegans*) is the most popular and recognizable pet turtle in New Zealand. Characterized by the distinctive red stripes behind their eyes and their active, inquisitive personalities, these semi-aquatic reptiles are fascinating pets to observe. However, they are frequently purchased as tiny, cute hatchlings without the buyer realizing the massive size they will reach as adults—often growing up to 30cm in shell length—or the extraordinary commitment required, as they can live for 20 to 40 years in captivity.

Caring for an adult Red-eared Slider requires a large, dedicated setup. A minimum tank size of 150 litres is necessary for a single adult to provide adequate swimming space. In addition to a deep swimming area, sliders require a completely dry basking platform where they can pull themselves out of the water to dry off. This basking spot must be equipped with two essential lamps: a heat lamp creating a localized temperature of 30–35°C, and a high-quality UVB light (5.0 or 10.0). Without daily exposure to UVB radiation, turtles cannot synthesize vitamin D3, leading to Metabolic Bone Disease (MBD), which causes soft, deformed shells and eventual death.

Turtles are exceptionally messy eaters and produce a large amount of waste, meaning a powerful external canister filter is essential to maintain clean, safe water. Their diet is omnivorous, consisting of commercial turtle pellets, leafy greens (such as dandelion greens and romaine lettuce), and occasional protein treats like earthworms. In warmer parts of New Zealand, adult sliders can be transitioned to secure outdoor ponds during the summer, provided the enclosure is entirely escape-proof. If you are considering a slider, ensure you are prepared for a multi-decade commitment, as rehoming adult turtles in NZ is incredibly difficult.