Red-Eared Slider Trachemys scripta elegans
The cheapest and most misunderstood aquatic turtle. A coin-sized hatchling in a plastic tub looks easy β but it grows to the size of a dinner plate, lives thirty to forty years, and is an invasive species that is illegal to release.
βοΈ Legal status Β· Check the source
Not a protected species, and keeping one is not illegal. However it is designated an invasive species under management in China β releasing it is a legal violation, and abandonment causes severe damage to local waterways. Once you take one on, you are committing to its full three-to-four-decade lifespan.
Check another species βKey parameters
- Lifespan
- 20-40 years
- Adult size
- Females reach 25-30 cm carapace; males stay smaller at 15-20 cm
- Diet
- Omnivorous. Juveniles lean carnivorous (pellets, dried shrimp, small fish); adults should transition largely to aquatic plants and greens
- Temperature
- Water 24-28 Β°C, basking spot 32-35 Β°C
- Humidity
- Aquatic β what matters is water quality and filtration, not air humidity
β Suits you if
Anyone with room for a large aquarium, able to maintain a filtration system long term, and who genuinely accepts a multi-decade commitment
π« Do not get one if
Anyone drawn in by βthey're a few dollars and live in a small tubβ β that belief is this species' single biggest problem
Starter equipment list
Buy all of it before the animal arrives, not after.
- Aquarium: 120 cm or longer for a single adult. More water volume means more stable water quality
- Filtration: rated 3-5Γ the water volume. Sliders produce far more waste than fish of the same size
- Basking platform: it must be able to dry off completely out of the water, or the shell rots
- UVB lamp plus basking lamp over the platform, creating a 32-35 Β°C basking spot
- Aquarium heater and thermometer to hold water temperature and prevent winter crashes
- Cuttlebone or a calcium block left in the water for it to gnaw
Most common beginner mistakes
- 1 Keeping it in a small tub for life β the most common outcome, and the cruellest
- 2 Releasing it β illegal, and sliders outcompete native turtles. The damage is not reversible
- 3 No basking platform, or one it cannot fully leave the water on β the direct cause of shell rot and soft shell
- 4 Feeding only pellets and dried shrimp β excess protein causes pyramiding and kidney strain. Adults need to move toward plants
- 5 Skipping filtration and relying on frequent water changes β the resulting swings in temperature and chemistry are harder on the turtle than a filter would be
- 6 Housing with other turtles or fish β sliders are assertive and will bite tankmates
Common illnesses
| Illness | Common cause | What you'll see |
|---|---|---|
| Shell rot | Poor water quality, no way to dry off fully, untreated injury | Pitting, white patches, softening or discharge on the shell, often with an odour |
| Swollen eye disease | Bacterial infection driven by deteriorating water quality | Swollen eyelids, eyes held shut, white discharge, then refusal to eat |
| Pneumonia | Sudden drops in water temperature, chronically inadequate heating | Floating and unable to dive, listing to one side, open-mouth breathing, bubbles at the nose |
| Soft shell / metabolic bone disease | Lack of UVB and calcium | Shell yields under light pressure, edges curl upward, deformed growth |
Frequently asked
Can I keep a red-eared slider in a small tub?
No. The cheap hatchlings sold by the handful grow to 25-30 cm and need 120 cm or more of water. A small container leads directly to shell rot, soft shell and lifelong deformity. If a small tub is all you can offer, do not start.
If I can't keep it any more, can I release it into a pond?
Absolutely not, and it is illegal. Red-eared sliders are a globally recognised invasive species and displace native turtles. The correct route is a local reptile rescue or a keeper able to take it on β never release it yourself.
Why is it floating at the surface and not diving?
That is a classic sign of pneumonia, usually triggered by a drop in water temperature, and it needs a vet immediately. Do not simply raise the heat and wait β floating means the lungs are already affected.