Red-Eared Slider Care Guide: Setup, Feeding & Tank Requirements

by Ryan Lim August 17, 2026

Introduction to Red-Eared Sliders

Red-Eared Sliders (Trachemys scripta elegans), or what we commonly know as terrapins in Singapore, are one of the most popular pet turtles in the world — and for good reason. They're hardy, interactive, and fascinating to watch. However, they do require a proper setup to thrive. This guide covers everything you need to give your slider a long, healthy life.

Tank Size Requirements

Red-Eared Sliders grow large — adults can reach 20–30 cm in shell length. A common rule of thumb is 10 gallons (about 38 litres) of water per 2.5 cm of shell length. For a fully grown adult, you'll need at least a 150–200 litre tank.

Hatchlings can start in a smaller tank, but plan to upgrade as they grow. Browse our Terrarium Tanks to find the right size for your slider.

Tank Setup Essentials

A Red-Eared Slider enclosure needs both a water area for swimming and a dry basking area. Here's what you'll need:

Basking platform — a ramp or dock that lets your turtle fully exit the water and dry off completely.
UVB lighting — absolutely essential. Without UVB, turtles cannot metabolise calcium and will develop metabolic bone disease. Use a UVB bulb rated for reptiles. See our Terrarium and Reptile Lights.
Basking lamp — provides heat over the basking area. Aim for a basking spot temperature of 30–35°C.
Water heater — keep water temperature between 24–28°C. Check our Temperature Control range.
Powerful filter — turtles are messy! You need a filter rated for at least 3–6× your tank volume. Browse our Aquarium Filters.
Substrate — large river rocks or bare bottom are easiest to clean. Fine gravel can be accidentally ingested. See Terrarium Substrates.

Water Quality

Turtles produce a lot of waste, so water quality is critical. Test your water weekly for ammonia, nitrite, and nitrate using an aquarium test kit. Perform 25–50% water changes weekly, or more often if levels spike.

Always dechlorinate tap water before adding it to the tank.

Lighting Schedule

Red-Eared Sliders need a consistent light cycle to regulate their body clock and behaviour. Aim for 12 hours of light and 12 hours of darkness daily. A timer makes this effortless. Explore our reptile lighting range for suitable UVB and basking bulbs.

Feeding Your Red-Eared Slider

Red-Eared Sliders are omnivores. A balanced diet includes:

Commercial turtle pellets — a good staple that provides balanced nutrition.
Leafy greens — romaine lettuce, dandelion greens, and kale. Avoid spinach and iceberg lettuce.
Protein — feeder fish, earthworms, or cooked chicken occasionally.
Aquatic plants — water hyacinth and duckweed are great natural additions.

Feeding frequency: Juveniles (under 1 year) should be fed daily. Adults can be fed every other day. Remove uneaten food promptly to keep water clean.

Tip: Feed your turtle in a separate container to reduce mess in the main tank.

Humidity and Misting

While Red-Eared Sliders are primarily aquatic, maintaining appropriate humidity around the basking area helps with shell health. A terrarium misting system can help regulate this, especially in air-conditioned environments.

Common Health Issues to Watch For

Shell rot — soft or discoloured patches on the shell, often caused by poor water quality or insufficient basking.
Respiratory infection — wheezing, open-mouth breathing, or listing to one side in the water. Usually caused by cold water temperatures.
Vitamin A deficiency — swollen eyelids, caused by a diet lacking in leafy greens.
Metabolic bone disease — soft shell and lethargy from insufficient UVB exposure.

If you notice any of these signs, consult a reptile-experienced vet promptly.

Lifespan and Commitment

Red-Eared Sliders can live 20–40 years in captivity with proper care. They are a long-term commitment — make sure you're ready for the journey before bringing one home!

Ready to set up the perfect home for your slider? Browse our full Terrarium & Reptile range at Fins and Paws. 🐢