The red-eared slider is an aquatic turtle that needs a tank with both water and dry land: for an adult, at least 150–200 litres, with water at 24–28 °C, a basking spot under a heat lamp (30–35 °C), a UVB lamp on for 10–12 hours a day and a powerful filter. Feed it a food made for aquatic turtles plus fish, shrimp, insects and greens: young turtles daily, adults every 2–3 days. Without UV light and warmth turtles get sick: the shell softens, metabolic bone disease develops and immunity drops.
What to know before buying
- A slider lives 20–30 years or longer — it's a long-term commitment.
- A coin-sized hatchling grows to 20–30 cm (females are larger than males).
- It's an invasive species: never release a turtle into ponds or rivers — in Europe it displaces the native European pond turtle.
- Reptiles can carry salmonella: always wash your hands after handling, especially with children in the home.
The tank: size and setup
| Parameter | Guideline |
|---|---|
| Volume for a young turtle (under 10 cm) | From 60–100 litres |
| Volume for an adult turtle | From 150–200 litres; bigger is better |
| Water depth | At least the shell's width so the turtle can right itself |
| Land area | About 25% of the surface, with an easy, gentle ramp |
| Water temperature | 24–28 °C |
| Basking spot temperature | 30–35 °C |
Small plastic turtle tubs with a palm tree are only a temporary home for hatchlings — turtles outgrow them quickly.
Equipment
- A heat lamp over the land area — turtles bask under it for hours.
- A UVB lamp — needed to absorb calcium. Aquatic turtles usually get lamps marked 5.0; run it 10–12 hours a day and replace it as the manufacturer recommends (usually every 6–12 months), even if it still lights up. Glass blocks UV, so the lamp must shine directly onto the basking area.
- A water heater with a thermostat and a protective guard.
- A filter with spare capacity: turtles make water dirty fast.
- Thermometers for the water and the basking area.
Lamps and equipment are in reptile equipment. Choosing a filter and heater is much like setting up an aquarium — see aquarium for beginners.
What to feed a red-eared slider
The base of the diet is a commercial food for aquatic turtles: it's balanced for protein, calcium and vitamins. For example, Tetra ReptoMin sticks, Tetra ReptoMin Junior for young turtles, and ReptoMin Energy granules for variety. In addition:
- pieces of lean fish with small bones, shrimp, snails and insects — especially for young turtles;
- greens for adults: lettuce, dandelion leaves, aquatic plants;
- reptile calcium supplements — as directed.
Feed in the water — turtles swallow only underwater. Give as much as the turtle eats in 10–15 minutes and remove leftovers so the water stays clean. Young turtles under a year eat daily, adults every 2–3 days. All foods are in reptile food.
What not to feed
- raw red meat, sausage, mince — too much fat and phosphorus;
- bread, porridge, dairy;
- dried gammarus only — it doesn't meet their needs and is fine only as a treat;
- cat or dog food.
Common mistakes
- Keeping the turtle out of water on the floor or in a tiny basin.
- Skipping the UVB lamp or placing it behind glass.
- Cold water — the turtle becomes sluggish, eats poorly and gets sick.
- Infrequent water changes and a weak filter — skin and eye diseases.
- Overfeeding — the turtle gains weight quickly and the shell becomes deformed.
Signs that a turtle is ill
Refusing food for more than a week at the right temperature, a soft or deformed shell, swollen closed eyes, listing while swimming, white patches and peeling skin, nasal discharge. With these symptoms, see a vet who treats reptiles.
Frequently Asked Questions
How long do red-eared sliders live?
With good care, 20–30 years or longer.
How often should I feed a red-eared slider?
Young turtles under a year daily, adults every 2–3 days.
Does a red-eared slider need a UVB lamp?
Yes, definitely: without UVB, calcium isn't absorbed and metabolic bone disease develops.
Can a red-eared slider live without a basking area?
No. It needs a place to climb completely out of the water and bask under a lamp.
