Red-Eared Slider (Trachemys scripta elegans) Care Sheet
The Red-Eared Slider is a medium-sized freshwater turtle native to parts of the United States and northern Mexico. It gets its common name from the distinctive red or orange stripe behind each eye.
Although commonly sold as small juveniles, Red-Eared Sliders grow substantially, can live for several decades and require large, well-filtered aquatic accommodation. They should never be regarded as low-maintenance pets.
Quick Facts
Scientific name: Trachemys scripta elegans
Common name: Red-Eared Slider
Family: Emydidae
Origin: United States and northern Mexico
Adult size: Females commonly 20–30 cm; males generally smaller
Lifespan: Commonly 20–30+ years, potentially considerably longer with excellent care
Diet: Omnivorous
Activity: Diurnal
Lifestyle: Aquatic/semi-aquatic
Experience level: Intermediate
Temperament: Generally alert and active; not a species that benefits from frequent handling
Natural Habitat
Red-Eared Sliders naturally inhabit slow-moving or still freshwater environments including:
- Ponds
- Lakes
- Marshes
- Wetlands
- Slow-moving rivers
- Streams
- Reservoirs
They favour areas containing abundant aquatic vegetation, submerged structures and easily accessible basking sites.
Much of the day may be spent swimming, foraging or basking.
Adult Size
Females are substantially larger than males and can reach approximately:
20–30 cm (8–12 in) shell length
Males commonly remain around:
13–23 cm (5–9 in)
Juveniles sold at only a few centimetres long should never be housed on the assumption that they will remain small.
Lifespan
Red-Eared Sliders are a significant long-term commitment.
With appropriate husbandry they may live:
20–30+ years
Some individuals can survive considerably longer.
Prospective keepers should plan for the animal’s entire adult lifespan before acquisition.
Housing
Red-Eared Sliders require spacious aquatic accommodation containing both a substantial swimming area and a completely dry basking platform.
Adult accommodation should provide:
- Large swimming area
- Appropriate water depth
- Powerful filtration
- Completely dry basking area
- Heat source
- UVB lighting
- Secure access between water and land
- Environmental enrichment
Small plastic turtle tubs and shallow bowls are unsuitable for long-term housing.
Enclosure Size
There is no single enclosure measurement suitable for every Red-Eared Slider.
Larger accommodation should always be preferred.
Adult females in particular require very substantial aquatic systems, and many conventional aquariums become inadequate as the turtle matures.
The enclosure should allow unrestricted:
- Swimming
- Diving
- Turning
- Surfacing
- Basking
- Exploration
Large aquariums, indoor ponds and purpose-built turtle systems can all be suitable when correctly designed.
Water Depth
Red-Eared Sliders are strong swimmers and should be provided with substantial swimming depth.
Water should be deep enough for normal swimming and diving behaviour while allowing the turtle to surface easily.
Hatchlings and animals with medical or mobility problems may require modified depths.
Water Temperature
A useful general range for healthy adults is approximately:
24–26°C
Juveniles may benefit from slightly warmer conditions.
Water temperature should be measured using a reliable thermometer rather than estimated by touch.
Water Heating
Where room temperatures are insufficient, an appropriately sized aquarium heater may be required.
Any heater accessible to the turtle should be:
- Robust
- Securely installed
- Appropriately guarded
Turtles can damage exposed equipment, and direct contact with heating elements can cause injury.
Basking Area
A completely dry basking area is essential.
The turtle must be able to climb fully out of the water and dry:
- Shell
- Limbs
- Plastron
The platform should be:
- Stable
- Non-slip
- Large enough for the entire turtle
- Easy to access
- Positioned beneath heat and UVB sources
Constantly damp basking platforms are unsuitable.
Basking Temperature
Aim for a basking surface temperature of approximately:
30–33°C
The temperature should be measured at shell level or directly on the basking surface using suitable equipment.
The turtle must be able to leave the basking area whenever desired.
UVB Lighting
Red-Eared Sliders require access to appropriate UVB radiation.
UVB assists with vitamin D3 production and normal calcium metabolism.
Without appropriate UVB exposure, turtles are at increased risk of serious skeletal and shell disorders.
Use a reputable reptile UVB lamp appropriate for the enclosure dimensions.
UVB should reach the basking area without passing through glass or plastic, as these materials can substantially reduce or block useful UVB.
Lighting
Provide a consistent day/night cycle.
Approximately:
10–12 hours of light per day
is a reasonable general starting point.
Lights should be switched off overnight to provide a proper dark period.
Timers can help maintain a consistent schedule.
Filtration
Red-Eared Sliders produce considerably more waste than most aquarium fish.
Powerful filtration is therefore essential.
External canister filters and similarly high-capacity systems are commonly used.
Filtration should provide:
- Mechanical filtration
- Biological filtration
- Strong water circulation
- Easy maintenance
A filter rated substantially above the aquarium’s actual water volume is often beneficial for turtle accommodation.
Water Quality
Clean water is essential for long-term health.
Poor water quality can contribute to:
- Skin irritation
- Eye problems
- Shell infections
- Increased bacterial growth
- Unpleasant odours
Regular partial water changes remain necessary even when powerful filtration is installed.
Water Testing
Aquatic turtle systems benefit from routine monitoring of water chemistry.
Useful parameters include:
- Ammonia
- Nitrite
- Nitrate
- pH
Ammonia and nitrite should remain at safe levels in a properly established biological filtration system.
Substrate
Bare-bottom enclosures are acceptable and make cleaning easier.
If substrate is used, avoid small gravel that could potentially be swallowed.
Large smooth stones that cannot fit inside the turtle’s mouth may be safer.
Any substrate should be easy to maintain hygienically.
Enrichment
A well-designed environment encourages natural behaviour.
Suitable features may include:
- Large pieces of driftwood
- Secure rocks
- Aquatic plants
- Visual barriers
- Different swimming depths
- Submerged resting areas
All objects must be stable and positioned so the turtle cannot become trapped underwater.
Diet
Red-Eared Sliders are omnivorous.
Juveniles generally consume proportionally more animal-based food, while adults typically consume greater quantities of plant material.
A balanced diet should be based around a reputable complete aquatic-turtle food supplemented appropriately with plant matter and other suitable foods.
Commercial Turtle Pellets
High-quality aquatic turtle pellets can form an important part of the diet.
Choose foods formulated specifically for aquatic turtles rather than relying on dried shrimp or generic fish foods as the primary diet.
Pellets should still be combined with appropriate dietary variety.
Plant Foods
Adult Red-Eared Sliders should regularly receive suitable leafy greens and aquatic vegetation.
Possible foods include:
- Dandelion greens
- Collard greens
- Mustard greens
- Endive
- Escarole
- Appropriate aquatic plants
Dietary variety is preferable to reliance upon one vegetable.
Animal-Based Foods
Appropriate animal foods may occasionally include:
- Earthworms
- Appropriate insects
- Snails
- Freshwater invertebrates
- Suitable whole fish
Animal protein should not dominate the diet of healthy adults.
Foods to Avoid
Avoid routinely feeding:
- Processed human foods
- Bread
- Dairy products
- Dog or cat food
- Cooked seasoned meats
- Excessive fatty meat
- Large quantities of dried shrimp
Dried shrimp alone do not constitute a balanced turtle diet.
Calcium
Adequate dietary calcium is essential for healthy bones and shell development.
Calcium can be provided through:
- Properly formulated turtle foods
- Calcium-rich plant foods
- Appropriate whole prey
- Cuttlebone where suitable
Correct UVB exposure is also essential for effective calcium metabolism.
Feeding Frequency
Juveniles generally require feeding more frequently than adults.
Adults can usually receive appropriately portioned meals several times each week, with suitable plant foods offered regularly.
Feeding should be adjusted according to:
- Age
- Size
- Activity
- Body condition
- Health
- Water temperature
Overfeeding is common and can contribute to obesity and poor water quality.
Handling
Red-Eared Sliders generally do not benefit from routine recreational handling.
Handling should mainly be reserved for:
- Health checks
- Enclosure maintenance
- Necessary transportation
- Veterinary examination
Always support the turtle securely and avoid dropping it.
Never lift a turtle by its tail.
Hygiene
Aquatic turtles can carry Salmonella and other microorganisms without appearing ill.
Wash hands thoroughly with soap and water after:
- Handling the turtle
- Touching enclosure water
- Cleaning filters
- Handling equipment
- Preparing turtle food
Aquarium equipment should not be cleaned in areas used for food preparation.
Children should be appropriately supervised.
Sexing
Adult males and females become easier to distinguish as they mature.
Males generally develop:
- Longer front claws
- Longer, thicker tails
- Cloacal opening positioned farther along the tail
Females usually:
- Grow considerably larger
- Have shorter front claws
- Possess shorter tails
Young juveniles cannot always be sexed reliably.
Egg Laying
Female Red-Eared Sliders can produce eggs even without a male being present.
Adult females therefore require access to appropriate nesting opportunities when showing reproductive behaviour.
Signs may include:
- Increased restlessness
- Repeated attempts to leave the water
- Digging behaviour
- Reduced appetite
Failure to lay eggs normally can become a veterinary emergency.
Brumation
Wild Red-Eared Sliders may undergo periods of reduced activity during cold weather.
Artificially inducing brumation in captivity is unnecessary for ordinary pet husbandry and carries risks if performed incorrectly.
Animals should not be deliberately cooled without a clear reason and appropriate specialist guidance.
Common Health Problems
Potential health concerns include:
- Metabolic bone disease
- Shell infections
- Respiratory infections
- Eye problems
- Vitamin deficiencies
- Obesity
- Trauma
- Parasites
- Egg retention
- Poor shell growth
Seek veterinary attention for symptoms including:
- Persistent lack of appetite
- Swollen or closed eyes
- Nasal discharge
- Open-mouth breathing
- Abnormal floating
- Listing to one side
- Soft shell
- Shell lesions
- Significant behavioural changes
A veterinarian experienced with reptiles should assess suspected illness.
Shell Health
A healthy shell should generally be firm and free from:
- Deep pits
- Ulcers
- Bleeding
- Foul odours
- Soft areas
- Significant abnormal discolouration
Normal shedding of the outer scutes can occur as the turtle grows.
Never forcibly peel scutes from the shell.
Respiratory Disease
Respiratory disease can become serious in aquatic turtles.
Possible warning signs include:
- Nasal bubbles
- Wheezing
- Open-mouth breathing
- Lethargy
- Reduced appetite
- Difficulty diving
- Floating unevenly
Veterinary assessment should not be delayed when these signs occur.
Introduced Populations
Red-Eared Sliders have become established outside their native range in numerous countries.
This has largely resulted from unwanted pet turtles being released into the wild.
Released animals can:
- Compete with native wildlife
- Spread disease
- Establish invasive populations
- Disrupt ecosystems
Never release a captive turtle into the wild.
If an animal can no longer be kept, seek assistance from an appropriate rescue organisation or other legitimate rehoming route.
Legal Considerations
Ownership, sale, breeding, transport and importation of Red-Eared Sliders are restricted in some countries and regions because of their invasive potential.
Within parts of Europe, including the European Union, significant restrictions apply to the species.
Keepers should always check current local legislation before acquiring, breeding, selling or transferring a Red-Eared Slider.
Responsible Ownership
Before obtaining a Red-Eared Slider, consider:
- Adult enclosure size
- Large-volume filtration
- Electricity costs
- UVB replacement
- Heating
- Veterinary expenses
- Lifespan
- Adult size
- Local legislation
- Long-term rehoming difficulty
A tiny juvenile can eventually require hundreds of litres of aquatic accommodation.
Summary
The Red-Eared Slider (Trachemys scripta elegans) is an intelligent, active and long-lived freshwater turtle requiring considerably more care and space than its small juvenile size suggests.
Successful husbandry depends upon large aquatic accommodation, excellent filtration, clean water, a completely dry heated basking area, appropriate UVB exposure and a varied balanced diet.
With suitable facilities and responsible long-term care, Red-Eared Sliders can thrive for several decades.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace professional veterinary advice or current species-specific research.
Always research the individual requirements of your animal and comply with applicable wildlife and invasive-species legislation.
If you are concerned about your turtle’s health, consult a veterinarian experienced with reptiles.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026