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Painted Turtle — care sheet
Chrysemys picta · Intermediate
| Adult size | Carapace about 5-10 in (roughly 12-25 cm); Animal Diversity Web gives a range of 90-250 mm. Females are noticeably larger and heavier-bodied; males stay smaller with long front claws and a longer, thicker tail. |
|---|---|
| Lifespan | Commonly 25-30 years with good care, and 30-40+ years is realistic; some captives have reached nearly 50. Plan for a multi-decade commitment. |
| Tank | Think water volume, not "a tank." The modern rule is at least 10 gallons of water per inch of shell length, so a full-grown 8-10 in turtle needs a 75-100+ gallon system, and 150-200 gallons is better. As a footprint, aim for at least 36-48 in wide and 12+ in deep. A stock tank, tortoise/Waterland tub, or 100-gallon+ aquarium beats a cramped starter kit every time. One turtle per enclosure is easiest. |
| Water temperature | Adults/subadults: about 70-76°F (21-24°C). Juveniles: warmer, about 78-80°F (25-27°C). Hold it with a guarded submersible heater sized to the volume and verify with a separate thermometer. |
| Water depth | Deeper than people expect: at least 1.5 times the turtle's shell length so they can swim, dive, and right themselves if flipped. Painted turtles are strong swimmers and use the whole water column, so more depth (with easy access to the dock) is better. |
| Filtration | Turtles are messy, so over-filter: run a canister or filter rated for at least 2-3x the actual water volume in the tank (e.g. a large canister like a Fluval FX-series on a 100+ gallon system). Back it up with a partial water change of ~30% every 1-2 weeks. |
| Basking dock | A dry, sturdy dock (rock, log, or floating platform) big enough for the turtle to haul completely out and dry off. Basking-surface temperature about 85–95°F (29–35°C) via a focused halogen/basking flood — ReptiFiles cites up to ~104°F, so give a warm dock with a clear cool side; measure it with an infrared thermometer, don't guess. |
| Night | Turn the lamps off at night. As long as the room stays around 70-75°F (21-24°C), no night heat is needed; the water heater holds the water steady. Avoid prolonged drops much below that outside a deliberate, vet-informed brumation. |
| UVB & lighting | A linear T5 HO UVB tube is the standard, e.g. Arcadia T5 HO 6% or Zoo Med ReptiSun 5.0 T5 HO, mounted roughly 13-14 in above the dry dock to land a UV Index of about 3.0-4.0 on the basking surface (Ferguson Zone 3). Never filter it through glass or plastic. Replace the bulb every ~6-12 months per the maker even if it still glows, since UVB output fades. |
| Tank bottom | Bare-bottom is easiest, cleanest, and has the lowest impaction risk, ideal for beginners. If you want a natural look, use large smooth river rocks each bigger than the turtle's head so they can't be swallowed. Avoid fine gravel and loose sand, which can be ingested and cause impaction. |
| Diet | Omnivores whose ratio shifts with age. Juveniles (under ~1 yr): roughly 50% animal protein / 50% plants, fed daily. Adults: shift toward ~25% protein / 75% plants, offering protein or a quality aquatic-turtle pellet only 2-3x/week with leafy greens/aquatic plants daily. Protein sources include pellets, feeder fish/worms, and insects; skip fatty meats and iceberg lettuce. |
| Supplements | Leave a cuttlebone floating in the water at all times for free-choice calcium and replace it every 1-2 months. With real UVB plus a varied diet and cuttlebone, most keepers don't need heavy powder supplementation; a light calcium (with D3 optional under good UVB) dusting on protein for growing juveniles is a reasonable extra. |
Before you buy
- This is a 25-40+ year animal; are you ready for a friend that could outlast your current home, job, or relationship?
- Budget for the real setup up front: a 75-150+ gallon water system, a canister filter rated 2-3x the volume, a submersible heater, a basking lamp, and a genuine T5 HO UVB fixture. It costs more than the turtle.
- You'll be doing regular water changes and cleaning for decades; are you okay with the ongoing wet, messy maintenance?
- Every turtle can carry Salmonella; this is a watch-and-admire pet, not a cuddle pet, and a poor match for households with kids under 5 or immunocompromised people.
- Locate an exotics/reptile vet in your area before you buy, and never take a native painted turtle from the wild (it's often illegal and bad for both the turtle and local populations).
See a reptile vet if…
- Swollen, puffy, or crusted eyes, or eyes sealed shut with discharge, a classic sign of vitamin A deficiency and infection.
- Bubbles from the nose or mouth, wheezing, open-mouth or neck-stretched breathing, or swimming lopsided/tilted to one side, which point to a respiratory infection or pneumonia.
- A soft, spongy, pyramided, or deformed shell, or weak/bowed legs, all warning signs of metabolic bone disease.
- Shell that is pitting, flaking, foul-smelling, discolored, or has open sores (shell rot), or any open wound or abscess/lump on the head, mouth, or limbs.
- Refusing food for an extended period, unexplained weight loss, lethargy, or a turtle that never basks or can't swim/right itself normally.
- When in doubt, see an exotics vet promptly; these notes are triage cues, not a diagnosis.
Never
- Never keep them in unheated, unfiltered, or dirty water; cold and poor water quality cause most illnesses.
- Never skip real UVB or filter it through glass/plastic; it causes metabolic bone disease.
- Never house them in a tank too small to swim in or without a dry basking dock they can fully climb onto.
- Never feed a diet of iceberg lettuce, fatty meats, or protein-only; it drives vitamin A deficiency and obesity.
- Never let the basking dock stay damp or the turtle stay wet 24/7; it invites shell rot.
- Never brumate a hatchling, juvenile, or any unhealthy turtle, and never let water reach freezing.
- Never release a pet painted turtle into the wild, and never take one from the wild.
Common painted turtle questions
How hard are Painted Turtles to keep — are they good for beginners?
Intermediate. Hardy and forgiving temperament-wise, but the setup is the hard part: a big, heated, heavily filtered water body plus a proper dry basking dock under real UVB. The husbandry bar is higher than most beginners expect, and this is a 25-40 year commitment.
What do Painted Turtles eat?
Omnivores whose ratio shifts with age. Juveniles (under ~1 yr): roughly 50% animal protein / 50% plants, fed daily. Adults: shift toward ~25% protein / 75% plants, offering protein or a quality aquatic-turtle pellet only 2-3x/week with leafy greens/aquatic plants daily. Protein sources include pellets, feeder fish/worms, and insects; skip fatty meats and iceberg lettuce.
How big a tank do Painted Turtles need?
Think water volume, not "a tank." The modern rule is at least 10 gallons of water per inch of shell length, so a full-grown 8-10 in turtle needs a 75-100+ gallon system, and 150-200 gallons is better. As a footprint, aim for at least 36-48 in wide and 12+ in deep. A stock tank, tortoise/Waterland tub, or 100-gallon+ aquarium beats a cramped starter kit every time. One turtle per enclosure is easiest.
What water temperature do Painted Turtles need?
Adults/subadults: about 70-76°F (21-24°C). Juveniles: warmer, about 78-80°F (25-27°C). Hold it with a guarded submersible heater sized to the volume and verify with a separate thermometer.
What water depth do Painted Turtles need?
Deeper than people expect: at least 1.5 times the turtle's shell length so they can swim, dive, and right themselves if flipped. Painted turtles are strong swimmers and use the whole water column, so more depth (with easy access to the dock) is better.
What filtration do Painted Turtles need?
Turtles are messy, so over-filter: run a canister or filter rated for at least 2-3x the actual water volume in the tank (e.g. a large canister like a Fluval FX-series on a 100+ gallon system). Back it up with a partial water change of ~30% every 1-2 weeks.
What basking dock do Painted Turtles need?
A dry, sturdy dock (rock, log, or floating platform) big enough for the turtle to haul completely out and dry off. Basking-surface temperature about 85–95°F (29–35°C) via a focused halogen/basking flood — ReptiFiles cites up to ~104°F, so give a warm dock with a clear cool side; measure it with an infrared thermometer, don't guess.
What night-time temperature do Painted Turtles need?
Turn the lamps off at night. As long as the room stays around 70-75°F (21-24°C), no night heat is needed; the water heater holds the water steady. Avoid prolonged drops much below that outside a deliberate, vet-informed brumation.
What UVB and lighting do Painted Turtles need?
A linear T5 HO UVB tube is the standard, e.g. Arcadia T5 HO 6% or Zoo Med ReptiSun 5.0 T5 HO, mounted roughly 13-14 in above the dry dock to land a UV Index of about 3.0-4.0 on the basking surface (Ferguson Zone 3). Never filter it through glass or plastic. Replace the bulb every ~6-12 months per the maker even if it still glows, since UVB output fades.
What substrate do Painted Turtles need?
Bare-bottom is easiest, cleanest, and has the lowest impaction risk, ideal for beginners. If you want a natural look, use large smooth river rocks each bigger than the turtle's head so they can't be swallowed. Avoid fine gravel and loose sand, which can be ingested and cause impaction.
What supplements do Painted Turtles need?
Leave a cuttlebone floating in the water at all times for free-choice calcium and replace it every 1-2 months. With real UVB plus a varied diet and cuttlebone, most keepers don't need heavy powder supplementation; a light calcium (with D3 optional under good UVB) dusting on protein for growing juveniles is a reasonable extra.
How big do Painted Turtles get?
Carapace about 5-10 in (roughly 12-25 cm); Animal Diversity Web gives a range of 90-250 mm. Females are noticeably larger and heavier-bodied; males stay smaller with long front claws and a longer, thicker tail.
How long do Painted Turtles live?
Commonly 25-30 years with good care, and 30-40+ years is realistic; some captives have reached nearly 50. Plan for a multi-decade commitment.
What are the signs Painted Turtles are sick or need a vet?
See a reptile or exotics vet if you notice: Swollen, puffy, or crusted eyes, or eyes sealed shut with discharge, a classic sign of vitamin A deficiency and infection.; Bubbles from the nose or mouth, wheezing, open-mouth or neck-stretched breathing, or swimming lopsided/tilted to one side, which point to a respiratory infection or pneumonia.; A soft, spongy, pyramided, or deformed shell, or weak/bowed legs, all warning signs of metabolic bone disease.; Shell that is pitting, flaking, foul-smelling, discolored, or has open sores (shell rot), or any open wound or abscess/lump on the head, mouth, or limbs.; Refusing food for an extended period, unexplained weight loss, lethargy, or a turtle that never basks or can't swim/right itself normally.; When in doubt, see an exotics vet promptly; these notes are triage cues, not a diagnosis..
Sources: ReptiFiles - Painted Turtle Care Sheet · PetMD - Painted Turtle (vet-reviewed) · Animal Diversity Web - Chrysemys picta · VCA Animal Hospitals - Common Diseases of Aquatic Turtles · Reptiles Magazine - Painted Turtle Care Sheet. Written and fact-checked by The Baskden Team — kind, general guidance, not a diagnosis and not a substitute for an exotics vet. baskden.com