The common musk turtle (Sternotherus odoratus) is one of the best-kept secrets in the turtle hobby. It stays small — 3 to 5 inches as an adult — which means it can live comfortably in a tank that would be far too small for a red-eared slider. It is hardy, long-lived, and has a personality that punches well above its size.
But "small" does not mean "low maintenance." Musk turtles have specific needs, and getting them right is the difference between a turtle that thrives for 50 years and one that struggles.
Species Overview
Common musk turtles are native to the eastern United States, from southern Canada down to Florida. They live in slow-moving rivers, ponds, and swamps with soft, muddy bottoms and plenty of aquatic vegetation.
| Attribute | Detail |
|---|---|
| Scientific name | Sternotherus odoratus |
| Common names | Musk turtle, stinkpot, common musk turtle |
| Adult size | 3–5 inches (8–13 cm) |
| Lifespan | 30–50 years |
| Diet | Carnivorous-leaning omnivore |
| Minimum tank (single adult) | 20 gallons |
| Recommended tank | 40-gallon breeder |
| Water temperature | 24–28°C (75–82°F) |
| Water depth | 6–12 inches |
| Basking temperature | 30–32°C (86–90°F) |
| UVB requirement | Essential; 5.0 bulb, 10–12 hours daily |
Tank Size and Setup
Musk turtles are small, but they are active and curious. A tank that looks adequate on day one can feel cramped once the turtle settles in.
Minimum tank size: 20 gallons for a single adult. Recommended: a 40-gallon breeder tank (36" x 18" footprint). The breeder shape is ideal because musk turtles spend most of their time walking along the bottom, and the extra floor space matters more than water depth.
For multiple musk turtles: add at least 10 gallons per additional turtle. A 40-gallon tank can comfortably house two, a 55-gallon can house three. Watch for aggression — musk turtles can be territorial, especially males.
Filter: a filter rated for 2x the tank volume. For a 40-gallon tank, choose a filter rated for 80 gallons or more. Canister filters are best. Musk turtles are messy eaters, and a weak filter will struggle to keep the water clear.
Substrate: bare-bottom is easiest to clean. If you want substrate, use sand or large river stones. Avoid small gravel — musk turtles will eat it and risk impaction.
Plants and decor: musk turtles appreciate cover. Add driftwood, cork bark, and hardy plants like Anubias or Java fern. They will climb on decor, so make sure everything is stable. See our UVB guide for lighting details.
Water Depth and Temperature
This is where musk turtles differ from most aquatic turtles. They are not strong swimmers. In the wild, they walk along the bottom of shallow streams and ponds rather than swimming in open water.
Water depth: 6 to 12 inches for adults. Hatchlings should be kept in 3 to 6 inches. The key is that the turtle must be able to reach the surface easily by walking up a piece of driftwood or a gentle ramp — not by swimming.
Water temperature: 24 to 28°C (75 to 82°F). Use a submersible heater with a guard and a separate thermometer. Musk turtles are hardy, but temperature stability still matters — sudden drops can cause respiratory infections.
Water quality: musk turtles are tolerant of a range of conditions, but clean water is still essential. Change 25% to 50% of the water weekly, and rinse filter media in tank water (never tap water).
Basking and Lighting
Musk turtles spend most of their time underwater, but they still need to bask. In the wild, they climb onto logs and rocks to dry off and absorb UVB.
Basking platform: a stable, non-slip platform that lets the turtle climb completely out of the water. Cork bark, a piece of slate, or a commercial turtle dock all work. The platform should be easy to reach from the bottom — remember, musk turtles walk, they do not jump.
Basking temperature: 30 to 32°C (86 to 90°F) at the surface of the platform. This is slightly cooler than what sliders need, which reflects the musk turtle's preference for cooler, shaded habitats.
UVB lighting: essential. Use a 5.0 UVB bulb mounted 20 to 30 cm above the basking platform. Run it 10 to 12 hours daily with a timer. Replace the bulb every 6 to 9 months — see our UVB guide for the full explanation.
Heat lamp: a low-wattage heat lamp over the basking platform. Because musk turtles bask less than sliders, a lower temperature is fine. Do not overheat the basking area — musk turtles are prone to overheating if the platform gets too hot.
Diet and Feeding
Musk turtles are carnivorous-leaning omnivores. In the wild, they eat insects, snails, small fish, tadpoles, and aquatic vegetation. In captivity, they thrive on a diet that is roughly 60% to 70% animal protein and 30% to 40% plant matter.
Staple foods:
- Commercial musk turtle or carnivorous turtle pellets
- Earthworms, mealworms, waxworms, bloodworms
- Small snails (shell-on for calcium)
- Feeder fish (offer infrequently — parasite risk)
- Frozen/thawed shrimp and krill
Plant matter (smaller portion):
- Duckweed, water lettuce, Elodea
- Romaine lettuce, dandelion greens
- Zucchini, carrot (grated)
Feeding schedule: juveniles (under 2 years) daily, adults every 2 to 3 days. Feed an amount roughly the size of the turtle's head per feeding. Remove uneaten food within 15 minutes.
Supplements: calcium (cuttlebone or calcium powder) twice weekly. A multivitamin once weekly, especially for indoor-kept turtles. See our complete diet guide for more detail.
Common Health Issues
Musk turtles are hardy, but they are still susceptible to the same health problems as other aquatic turtles when husbandry is inadequate.
- Shell rot. Caused by dirty water or insufficient basking. Early signs are white or grey patches on the shell. See our shell rot guide for treatment.
- Respiratory infection. Caused by temperature drops or poor water quality. Symptoms include open-mouth breathing, nasal discharge, and floating tilted. See our respiratory infection guide.
- Metabolic bone disease. Caused by inadequate UVB or calcium deficiency. The shell softens and deforms. See our UVB guide.
- Obesity. Caused by overfeeding. Musk turtles beg constantly. Stick to the schedule and ignore the begging.
One musk-turtle-specific concern: because they walk along the bottom more than they swim, they can develop problems with their plastron (bottom shell) if the substrate is rough or abrasive. Use sand or smooth river stones, not gravel.
Frequently Asked Questions
How big do musk turtles get?
Common musk turtles (Sternotherus odoratus) reach only 3 to 5 inches (8 to 13 cm) as adults. This makes them one of the smallest pet turtles available and ideal for keepers with limited space.
What size tank does a musk turtle need?
A single adult musk turtle can live comfortably in a 20 to 40-gallon tank. A 40-gallon breeder tank is ideal because it provides more bottom area for walking, which musk turtles prefer over deep swimming. Add 10 gallons for each additional musk turtle.
Why is my musk turtle called a stinkpot?
Musk turtles have musk glands near the edge of their shell that release a strong, musky odor when the turtle feels threatened. This defensive mechanism is where the nickname "stinkpot" comes from. The smell is not dangerous and usually fades quickly.
How long do musk turtles live?
With proper care, musk turtles commonly live 30 to 50 years in captivity. This is a long-term commitment that should be planned for before acquiring one.
Can musk turtles live with fish?
No. Musk turtles are opportunistic feeders and will eat any fish small enough to catch. Fast-moving fish may survive temporarily, but they should be considered food, not tank mates.
Final Thoughts
The musk turtle is an excellent choice for keepers who want a turtle but do not have space for a 100-gallon tank. It is small, hardy, long-lived, and full of personality. But it still needs the essentials: a proper filter, a basking platform, UVB lighting, and a diet that matches its carnivorous-leaning nature.
Get those right and a musk turtle will be a fascinating companion for decades.
Sources & References
- Ernst, C. H., & Lovich, J. E. (2009). Turtles of the United States and Canada (2nd ed.). Johns Hopkins University Press.
- Bonin, F., Devaux, B., & Dupré, A. (2006). Turtles of the World. Johns Hopkins University Press.
- Merck Veterinary Manual. Management and Husbandry of Reptiles. Retrieved 2026.
- Association of Reptilian and Amphibian Veterinarians (ARAV). Care sheets for common pet chelonians. Retrieved 2026.
- Turtle Times. Musk Turtle Tank Setup: The Small-Space Aquatic Pet. Retrieved 2026.
