The red-eared slider is one of the most widely kept aquatic turtles, recognised by the red stripe behind each eye.
Cheap hatchlings are sold in tiny bowls, but they grow into large, messy, long-lived turtles that need a substantial aquatic setup and decades of care.
Underestimating their size, mess and lifespan leads to many being released, where they become a damaging invasive species in many countries; in some places sale or release is now restricted.
Acquire one only with the space, filtration budget and 20-to-30-year-plus commitment they genuinely require.
Housing
An adult needs an aquarium or pond of at least 280 litres (75 gallons) for one turtle, with several times its shell length in swimming depth, plus a dry basking platform.
The basking area should reach 31-35C under a heat lamp, with water held around 24-26C by a submersible heater; keep juveniles and sick turtles warmer.
They produce heavy waste, so a powerful external or canister filter rated well above the tank volume is essential, along with regular water changes.
A UVB lamp over the basking dock is required for shell and bone health.
Keep the basking zone genuinely dry so the turtle can fully warm and dry off.
Diet
Red-eared sliders are omnivores whose diet shifts with age.
Hatchlings and juveniles are more carnivorous, while adults eat increasingly plant matter.
Feed a quality commercial aquatic turtle pellet as a base, plus leafy aquatic greens, and offer protein such as appropriately sized insects for younger turtles.
Feed juveniles daily and adults every two to three days, removing uneaten food to protect water quality.
Provide calcium via a cuttlebone.
Over-feeding, especially fatty protein and processed treats, plus low-calcium or low-UVB conditions, drives obesity, fatty liver, shell deformity and metabolic bone disease.
Health
A healthy slider has a hard, smooth shell, clear eyes, a strong swim and a good appetite.
Common problems include shell rot and soft shell from poor water quality or insufficient UVB and calcium, respiratory infection (gaping, listing in the water, bubbling) from cold water, and swollen eyes linked to vitamin A deficiency.
Poor water quality underlies most illness, so filtration and water changes are central to health.
Sliders can carry Salmonella, so hand-washing and supervision around children matter.
Any turtle floating abnormally, refusing food or labouring to breathe should see a reptile-capable exotics vet.
Temperament
Red-eared sliders are active, alert, strong swimmers that quickly learn to beg at feeding time, which many owners enjoy.
They are not affectionate and generally dislike handling, which can stress them, and larger turtles can deliver a painful bite if mishandled.
They do not need company and are often best kept singly, as multiple turtles increase waste, competition and aggression, and adult males may harass tank-mates.
If kept together, they need much more space and careful monitoring.
For most keepers, one well-housed turtle is the simplest and kindest choice.
A good fit for
Keepers with room for a large aquatic setup
People who enjoy watching rather than handling
Owners ready for heavy filtration and water changes
Those committed to 20-30+ years of care
Common mistakes to avoid
Tiny tanks and bowls for a growing turtle
Weak filtration causing chronic poor water quality
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