By Dr Duncan Houston
A turtle tank can look clean while its water, lighting or diet is quietly causing problems. Getting the setup right matters as much as choosing the food.
This guide focuses on Australian freshwater turtles, particularly eastern long-necked and Murray River turtles. Their needs differ from those of many overseas pet turtles, so identify your species before copying a care sheet.
Quick Answer
Freshwater turtles need room to swim, an accessible dry basking area, effective UVB lighting, suitable temperatures and filtered, regularly tested water. Eastern long-necked turtles are carnivores; Murray River turtles eat both animal and plant material. Breathing difficulty, serious shell injury or an inability to keep the head above water requires immediate veterinary help.
Start with the species and its adult needs
The eastern long-necked turtle is Chelodina longicollis; the Murray River turtle belongs to Emydura macquarii. Both need access to land as well as water, and ownership is a commitment measured in decades.
Plan for adult size. RSPCA Australia gives a 1.2-metre-long tank as a minimum starting point for most adults, with larger accommodation preferable. Tank width, usable swimming space and basking access also matter; a single litre figure cannot establish suitability. Turtles do not need a companion, and tank mates may compete or bite. See RSPCA Australia's turtle care guidance.
Check your state or territory wildlife authority before acquiring a turtle. For example, NSW requires a licence for pet native reptiles and lawful sourcing from licensed keepers or dealers. Never take a wild turtle home or release a pet into waterways.
What does a safe turtle habitat need?
Swimming space and a dry landing
Provide an easy ramp to a stable platform that supports the whole turtle out of the water. Keep swimming routes clear and prevent escape, entrapment and contact with heaters. A bare tank floor simplifies cleaning; any stones must be too large to swallow. Secure decorations so they cannot fall or trap the turtle. These principles are covered in VCA's aquatic turtle housing guidance.
Measured heat and effective UVB
Australian turtles should not automatically receive the warmer water settings used for other species. The Unusual Pet Vets' Australian turtle guide suggests water at 18 to 22°C for long-necked species, 20 to 24°C for short-necked species and a basking area at 28 to 34°C. These are starting ranges for the species covered, not a treatment plan for a sick turtle. Confirm settings for your animal's species, age and health.
Use thermostatic control and separate thermometers to check water and basking temperatures daily. The turtle must be able to move away from heat.
UVB supports vitamin D production and calcium use. A bright lamp is not proof of adequate UVB. Follow the lamp's installation and replacement instructions, including distance and any mesh effects; glass or plastic between the lamp and turtle blocks useful UVB. Ask a reptile vet to review the setup rather than choosing a lamp solely by its printed percentage.
Water quality beyond appearances
Filtration removes waste, while beneficial bacteria help process ammonia. Clear water can still contain harmful waste products. Use aquarium tests for ammonia, nitrite, nitrate, pH and hardness, recording results alongside temperature.
Test at least weekly during routine care and after water changes, with closer monitoring for a new or unstable system. Use appropriate treated replacement water and avoid abrupt temperature changes. Adjust partial water changes to the results and stocking load. Rinse biological filter media in removed tank water and avoid routinely sterilising the whole system. RSPCA explains the turtle tank's nitrogen cycle and maintenance.
What should Australian freshwater turtles eat?
Long-necked turtles need a varied carnivorous diet. Suitable animal foods can include appropriately sourced insects, worms and aquatic invertebrates. Murray River turtles need animal foods plus suitable plant material, such as safe aquatic plants and varied vegetables. They are not vegetarian turtles.
Feed in water. Portion size and frequency depend on species, age, body condition and temperature, so have a reptile vet check the feeding plan. Avoid an all-meat, all-fish or dried-shrimp-only diet. Calcium and vitamin supplementation should match the actual diet; do not add high-dose vitamins as a precaution.
A varied diet also reduces dependence on nutritionally incomplete favourites. Wild-caught fish or amphibians can introduce infections, and a fish-heavy diet can create nutritional problems. See VCA's explanation of aquatic turtle feeding risks; its slider-specific food proportions should not be copied directly for Australian long-necked turtles.
Which changes need attention?
| What you notice | What it may mean | What to do |
|---|---|---|
| Usual appetite and activity, normal swimming and an intact shell | No obvious illness, although equipment problems can still develop | Continue daily observation and scheduled water testing. |
| New appetite loss, reduced activity, swollen eyes or nasal discharge | Environmental, nutritional or infectious disease needs consideration | Contact a reptile vet today; record temperatures and recent changes. |
| New shell pitting, soft areas, discharge or an unpleasant smell | Possible infection, injury or abnormal mineralisation | Arrange prompt veterinary assessment; do not scrape or medicate the shell. |
| Gasping, marked sideways floating, severe weakness, major trauma or persistent protruding tissue | Potential respiratory disease, drowning risk or serious injury | Seek emergency veterinary care now. |
Is shell peeling normal or a sign of disease?
Shell plates can shed as a turtle grows. Thin shedding over an intact surface differs from exposed raw tissue, bleeding, deep pits or foul discharge. Abnormal growth or a newly soft shell needs examination; it cannot be reliably diagnosed from colour alone.
Do not pull off attached shell plates or apply oils, household disinfectants or cosmetic shell treatments. VCA describes normal shedding, abnormal shell growth and shell injuries. Existing deformity may not fully reverse even after the underlying care problem is corrected.
What will the vet investigate?
Not eating is a sign, not a diagnosis. The vet will consider temperature, stress, diet, infection and other illness. Swollen eyes do not automatically mean vitamin A deficiency; giving vitamin A without a diagnosis risks overdose.
Breathing effort and abnormal buoyancy raise concern for respiratory disease. Shell infection can involve deeper tissue beneath the visible surface. Examination may be followed by imaging, blood work, parasite testing or sampling of a lesion. Bring care records because treatment and husbandry correction often need to happen together. VCA reviews common aquatic turtle diseases and diagnosis.
When is this an emergency?
Get immediate help for gasping, inability to stay safely at the surface, collapse, a cracked or bitten shell, heavy bleeding or tissue remaining outside the vent. Do not leave a weak turtle swimming while you wait.
Call the clinic for transport instructions. A secure ventilated container lined with a damp towel, without standing water, is generally appropriate for transport. Protect the turtle from overheating or chilling. Do not force-feed, glue a damaged shell or start leftover antibiotics.
Your practical care plan
- Today: confirm the species, record equipment settings and check the turtle can reach the basking platform easily.
- Every day: observe breathing, movement and appetite; check temperatures and remove uneaten food.
- Each week: review water-test results, maintenance needs and feeding records. Investigate changes rather than simply adding more food.
- For ongoing prevention: arrange regular reptile veterinary checks, including an annual review when appropriate. Keep new turtles separately pending a veterinary quarantine plan.
- For enrichment: provide safe swimming routes, cover and appropriate feeding variety. Make changes gradually and preserve easy surface access.
Common mistakes to avoid
- Applying one temperature or diet plan to every turtle species.
- Assuming visible light or sunshine through a window supplies adequate UVB.
- Using water clarity as the only water-quality check.
- Buying a second turtle to solve presumed loneliness.
- Waiting through repeated appetite changes or treating shell damage at home.
Protect your household as well as your turtle
Healthy turtles can carry Salmonella. Wash hands after handling the animal, food, tank or water, and keep equipment away from kitchens and food preparation areas. Do not kiss turtles.
The CDC's reptile hygiene guidance advises that children under five should not handle reptiles or their environments. Reptiles are also not recommended for households with adults aged 65 or older or people with weakened immune systems.
Frequently asked questions
Do aquatic turtles need to come out of the water?
Yes. Provide an accessible area where the entire turtle can leave the water and bask. A platform that sinks under its weight is unsuitable.
Can I feed my turtle only pellets?
Do not assume one food meets every species' needs. Ask a reptile vet to assess the formulation and overall diet, especially for Australian long-necked turtles.
Should I worry if my turtle stops eating?
Check the environment and contact a reptile vet about a new change. Appetite loss with breathing difficulty, weakness or abnormal swimming needs urgent assessment.
Does a soft shell just need more calcium?
No. Diet, UVB provision and disease may all be involved. A newly soft or misshapen shell needs a veterinary examination.
Can two turtles share a tank?
Sharing can lead to competition and injuries. Separate housing is often safer, and adding a companion is unnecessary.
Build care around the turtle you have
Species identification, measured conditions and a consistent routine make turtle care more manageable. Correct equipment problems promptly, and treat changes in breathing, swimming or shell integrity as reasons to seek veterinary help.
For clear explanations to support everyday animal care, explore ASK A VET™. A sick or injured turtle needs direct assessment by a reptile veterinarian.
The ASK A VET™ Tracker logs live location and activity trends, so a change in routine never goes unnoticed.
Every ASK A VET article is written and reviewed by qualified veterinarians.
