Pond slider / Red-eared slider — Care Sheet & Morphs

Husbandry requirements

Pond slider / Red-eared slider — origin: North America: central and southeastern United States (Mississippi Valley) to northeastern Mexico. A widely introduced species that has become invasive on every continent..

Terrarium temperature gradient

Night min20 °C

Cool side24–26 °C

Warm side26–30 °C

Basking spot32–35 °C

An aquatic AND heliophilic species: the WATER temperature is kept at 24-26°C for adults (26-28°C for juveniles). A genuine basking spot (heat lamp + UVB) at 32-35°C above a dry platform is essential for thermoregulation and for the shell to dry out completely. The water must not drop below ~20°C; the night air can fall a little more (~18°C) without risk.

Enclosure (adult)

150 × 60 × 60 cm

Aquaterrarium or large pond: a substantial water volume allowing free swimming + an accessible dry basking platform. An outdoor pond (temperate climate) is ideal for adults.

Minimum for ONE adult female; the usual rule: tank length >= 4-5x the carapace, water depth >= 2x the carapace height so she can swim and right herself. LEGAL WARNING: Trachemys scripta (notably elegans) is classified as an Invasive Alien Species of Union concern for the European Union (EU Regulation 1143/2014): sale, exchange, breeding and release are BANNED in the EU. NEVER release into the wild. Keeping animals acquired beforehand may be tolerated under certain conditions depending on the Member State — check local regulations.

Humidity

50–80 %

Not a limiting parameter for an aquatic species: ambient humidity is managed by the body of water. Water quality and temperature matter far more than air humidity.

Substrate

Bare bottom (recommended for hygiene and maintenance)Large river pebbles (too big to be swallowed)Fine sand (planted outdoor ponds)

Absolutely rule out small gravel and glass beads: swallowed during feeding, they cause digestive blockages. A bare bottom makes cleaning and monitoring water quality easier.

UVB

Recommended

Essential. UVB strip/tube 5.0 to 10.0 (T5 HO 6-10 %) above the basking platform, replaced every 6-12 months. Photoperiod of 10-12 h. Without effective UVB (combined with calcium), the animal quickly develops osteodystrophy (MBD) and a deformed shell.

Water source

Always available

Water quality is critical: powerful filtration (flow rate >= 2-3x the tank volume/hour, external filter recommended), dechlorinated water, regular partial changes. Depth sufficient to swim and submerge fully, while still being able to surface to breathe and right itself. Cold or fouled water is the leading cause of illness (respiratory, skin, eye).

Origin

Emydidae

North America: central and southeastern United States (Mississippi Valley) to northeastern Mexico. A widely introduced species that has become invasive on every continent.

Feeding & health

Diet

Shifting omnivore: carnivorous juveniles, mostly herbivorous adults — Young: small whole fish (not to excess), earthworms, aquatic insects, quality aquatic pellets. Adults: aquatic plants (elodea, duckweed, water lettuce), leafy vegetables (endive, dandelion, watercress) supplemented with occasional protein.

Feed juveniles daily, adults only 2-3 times/week (obesity and shell pyramiding are common in captivity). Provide a cuttlebone (calcium) at all times. Avoid excess animal protein in adults. Do not give mammal meat or bread.

Breeding

Oviparous

Clutch 6–25 eggs/young. Provide a terrestrial nesting area (a tray of moist, loose sand/topsoil) accessible to gravid females; otherwise there is a risk of egg retention (dystocia). Incubation ~55-80 days at 25-30°C. Temperature-dependent sex determination (TSD): low temperatures -> males, high -> females. Reminder: breeding this species is banned in the EU (Reg. 1143/2014).

Health watch points

Osteodystrophy / MBD and shell pyramiding (UVB or calcium deficiency, or excess protein)
Hypovitaminosis A (eyelid swelling, oral plaques, ocular discharge)
Aural abscesses (ear infections) — often linked to hypovitaminosis A and poor water quality
Shell rot / skin ulcers (shell rot, fouled water)
Respiratory infections / pneumonia (water or air too cold)

Morphs & genetics

Registry of 4 documented genes and 2 named combos for Pond slider / Red-eared slider.

Albino (T-) amelanisticRec
Pastel / Hypo lemonInc.d
Charcoal / Axanthic aneryRec
LeucisticRec

Named combos — 2 documented combined morphs

SnowGhost

Pairing calculator

Pick each parent's genotype — clutch probabilities update live. Free, no sign-up.

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Pond slider / Red-eared slider × Pond slider / Red-eared slider

Probabilities per gene (independent loci).

Expected clutchSelect at least one gene on a parent.

Frequently asked questions

Answers to the most common questions about keeping the pond slider / red-eared slider.

Can you still legally acquire a pond slider in France?▾

No, Trachemys scripta (including the subspecies elegans) is classified as an invasive alien species of Union concern under EU Regulation 1143/2014: sale, exchange, breeding and release are prohibited throughout the EU. Keeping animals acquired before the regulation may be tolerated under conditions depending on the Member State, but you must check local legislation and never release the animal into the wild.

What size does an adult pond slider reach?▾

Sexual dimorphism is marked: males measure between 12 and 20 cm of carapace, while females reach 25 to 30 cm, or even more than 35 cm for the Rio Grande variant. This size difference must be anticipated right from the setup.

What water volume and pond should you provide for an adult?▾

Allow at least 150 x 60 x 60 cm for an adult female, the usual rule being a tank length of at least 4 to 5 times the size of the shell and a water depth at least twice the height of the shell, so it can swim and turn freely. An outdoor pond in a temperate climate suits adults very well.

Is a basking area essential?▾

Yes, this species is as heliophilic as it is aquatic: it needs a genuine accessible dry area, heated between 32 and 35 °C under a lamp combined with UVB, to thermoregulate and dry its shell completely. In the wild, individuals readily pile up together to bask in the sun.

At what temperature should the water be kept?▾

The water is kept between 24 and 26 °C for adults, a little warmer (26-28 °C) for juveniles, and should never fall below about 20 °C. The night air can drop a little more, to around 18 °C, without risk.

Why are water quality and filtration so important?▾

Cold or dirty water is the leading cause of illness in this aquatic turtle: respiratory, skin or eye infections. You therefore need powerful filtration, a flow rate of at least 2 to 3 times the tank volume per hour, dechlorinated water and regular partial changes.

Is UVB really necessary?▾

Yes, it is essential: a UVB 5.0 to 10.0 fixture or tube above the basking area, replaced every 6 to 12 months, with a photoperiod of 10 to 12 hours. Without effective UVB, the animal quickly develops osteodystrophy and a deformed shell.

What does a pond slider eat according to its age?▾

Juveniles are carnivorous and eat whole small fish, earthworms and aquatic insects; as they grow, adults become mostly herbivorous, feeding mainly on aquatic plants and leafy vegetables. Feed the young every day but adults only 2 to 3 times a week, to avoid the obesity and shell pyramiding common in captivity.

How long does this species live?▾

It frequently reaches 20 to 30 years in captivity, with a potential of 40, or even more than 50 years in excellent conditions. It is a commitment spanning several decades, to be considered very seriously before any acquisition.

Does the aquatic substrate matter?▾

A bare bottom is recommended for hygiene and makes it easier to monitor water quality. Small gravel and glass beads must absolutely be avoided, as they are swallowed during feeding and cause digestive obstructions.

What are the main health problems of this turtle?▾

The most common are osteodystrophy and shell pyramiding from a UVB or calcium deficit, hypovitaminosis A with oedema and eye discharge, aural abscesses, shell rot in dirty water, and respiratory infections when the water or air is too cold.

How does the pond slider reproduce?▾

It is an oviparous species that lays 6 to 25 eggs several times a year, with an incubation of about 55 to 80 days between 25 and 30 °C; the sex of the young depends on the incubation temperature. As breeding the species remains prohibited in the EU, this regulatory constraint must be kept in mind before any breeding project.

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