Red-Eared Slider

Trachemys scripta elegans

Updated: September 2025

Quick Facts

Common name: Red-Eared Slider

Scientific: Trachemys scripta elegans

Type: Aquatic basking turtle

Adult size: ♀ ~10–12" carapace; ♂ ~6–9"

Lifespan: ~20–40+ years

Temperament: Can nip; limit handling

Adult enclosure: ~100+ gallons for one adult (rule: ~10 gal per inch shell)

Water temp: ~75–79°F (hatchlings toward warm end)

Basking surface: ~90–95°F (dry platform, full haul-out)

UVB/UVI: Strong UVB; aim ~UVI 3–5 at bask, shade elsewhere

Diet: Juveniles ~50% protein/50% greens; adults ~25% protein/75% greens

  • • Plan adult size from day one: ~100+ gallons for most adults.

    • Deep, open water for strong swimming + a completely dry basking dock.

    • Rule of thumb: ~10 gallons per inch of shell length.

  • • 12h light / 12h dark.

    • High-output UVB spanning part of the tank; target ~UVI 3–5 at the bask.

    • Bright visible light over water; replace UVB per schedule.

  • • Water: ~75–79°F (24–26°C); warmer end for hatchlings.

    • Basking platform (dry): ~90–95°F (32–35°C).

    • Measure with reliable thermometers/probes; lights off at night.

  • • External canister filter rated ~2–3× your actual water volume.

    • Keep ammonia 0 ppm, nitrite 0 ppm, nitrate <~40 ppm.

    • Partial water changes every 1–2 weeks (or as testing dictates).

  • • Bare bottom = easiest to clean. If substrate, use fine sand (avoid ingestible gravel).

    • Stable basking dock/ramps, hides, driftwood, hardy aquatic plants.

    • Secure all décor so it can’t trap the turtle.

  • • At least ~2× carapace length; deeper is great if basking is easy to access.

  • • <1 year: ~50% protein / 50% greens; offer daily (pellets every other day).

    • >1 year: ~25% protein / 75% greens; veggies daily, protein 1–2×/week, pellets 2–3×/week.

    • Staples: quality turtle pellets; dark leafy greens & aquatic plants; occasional earthworms/insects/whole prey.

    • Provide cuttlebone for calcium.

  • • Limit handling; support with two hands; sliders can nip.

    • Always wash hands after contact with animal, water, or equipment.

  • DAILY: Remove uneaten food/solid waste; top off with dechlorinated water.

    WEEKLY/BIWEEKLY: Test ammonia/nitrite/nitrate/pH; partial water change; service filter per maker.

    SAFETY: Clean equipment away from kitchens; disinfect sinks/tubs if used.

  • • Buoyancy issues (tilting), lethargy, appetite loss

    • Swollen/closed eyes, nasal discharge

    • Shell soft spots/erosion, foul odor, injuries/bites

    → See an experienced reptile vet promptly; husbandry check: heat/UVB, water quality, diet.

  • • US: Illegal to sell turtles <4" shell length; many states restrict sliders—check local laws.

    • Never release pets outdoors (invasive). Rehome via rescues if needed.

    • Public health: Salmonella risk—wash hands; keep out of kitchens; supervise children.

  • □ Large watertight tank (aim ~100+ gal adult)

    □ External canister filter (rated ~2–3× water volume)

    □ Test kit (ammonia/nitrite/nitrate, pH) + dechlorinator

    □ Dry basking dock/platform with ramp

    □ Heat lamp (halogen) for bask; IR temp gun/thermometer

    □ High-output UVB fixture; timer; GFCI outlet

    □ Stable décor (driftwood/rocks), hides, plants

    □ Quality pellets; greens; occasional protein items; cuttlebone

    □ Siphon/gravel-vac; dedicated buckets/towels

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