Reeves's Turtle — Fact Sheet

Mauremys reevesii · Reeves’s Turtle

Full care guide and sources

📋 At a glance

🏠 Enclosure

For one adult, use 120 x 60 x 50 cm as the enclosure planning minimum; provide more usable space for an unusually large animal. Juvenile housing is a separate stage and must be upgraded as the animal grows.

Plan from adult sex and size: a large female benefits from 150 cm length or a pond-style enclosure. Healthy adults can swim in deep water, but add broad submerged shelves, cork, and planted margins so they can rest and breathe without crossing open water. Hatchlings, weak animals, and new arrivals should begin shallower and gain depth only as coordination is confirmed.

The setup must include:

• deep enough water for normal swimming and turning
• an easy route to the surface
• a dry basking platform that supports the full body
• secure lids or high walls to prevent escape
• visual cover and resting points

Cohabitation is risky. Males may harass females, and turtles that appear peaceful can still bite, compete, or stress each other.

Reeves’s turtles in trade may be captive-bred, farmed, or imported. Quarantine a new arrival in a simple separate system with dedicated tools, record weight and feces, and seek reptile-veterinary testing when origin is uncertain. Shell pitting, swollen eyes, nasal bubbles, asymmetric swimming, or failure to bask are reasons for examination, not reasons to add another animal for company.

🪨 Substrate and furnishings

Use smooth rocks, driftwood, cork, sturdy aquatic plants, and resting ledges. Avoid sharp stones, unstable piles, tiny gravel that can be swallowed, and decorations that trap the turtle underwater.

Substrate can be bare-bottom, large river stones, or sand depending on the species and filtration plan. Every decoration must be easy to clean and impossible to collapse.

💡 Lighting

A dry basking area needs bright light and UVB. A quality T5 HO UVB tube or suitable mercury vapor system should cover the basking zone at the correct distance. Replace UVB lamps according to manufacturer output guidance.

For UV planning, treat this species as Ferguson Zone 2. Aim for about UVI 1-2 at the animal’s back or shell height in the basking zone, with a gradient down to shaded areas near zero UVI. This usually points to a moderate 5-7% T5/Forest-style UVB tube at a measured safe distance; measure with a Solarmeter 6.5 when possible, because reflector, mesh, distance, and lamp age change the real exposure.

🌡️ Temperature

• Basking spot: 31-34 °C

• Night: 20-22 °C

• Water: 22-26 °C

• Clear gradient required; the animal must be able to move between warm, cool, and hidden zones

• Measure basking surfaces with an infrared thermometer and ambient zones with digital probes

• Avoid heat rocks and unguarded heat sources

💧 Humidity and water

Aquatic turtles foul water quickly. Use oversized external filtration, regular partial water changes, and mechanical cleaning of trapped waste. Filter ratings for fish aquariums are usually too optimistic for turtles.

Ammonia and nitrite should remain at zero in an established system. Cloudy water, smell, skin irritation, and repeated eye problems often point to poor water quality rather than a need for medication.

Use a fully cycled biological filter and test ammonia, nitrite, nitrate, and source-water chemistry. Keep the outflow gentle enough that quiet resting zones remain available. A guarded heater prevents shell impact and burns, while a pre-filter keeps toes and small turtles away from strong intakes. Partial water changes should match dechlorinated replacement water closely in temperature.

Humidity is usually managed by the water itself. The important point is to keep the basking platform genuinely dry and warm so the shell and skin can dry completely.

Clean drinking and swimming water are the same system for most aquatic turtles, so water quality is a husbandry requirement, not decoration.

🪳 Feeding

Feed a varied diet based on quality turtle pellets, aquatic invertebrates, earthworms, fish items, leafy aquatic plants, and increasing plant matter with age. Juveniles usually need smaller, more frequent meals; adults should be fed more moderately to prevent obesity and water pollution.

Young turtles generally accept more invertebrate prey, whereas adults should be trained onto a genuinely mixed ration with a larger plant component. Use a complete pellet as the measured foundation, then rotate earthworms, snails, insect larvae, and safe greens or aquatic plants. Dried shrimp, fish fillet, and meat are not complete staples. Remove food scraps promptly, and judge meal size by body condition and growth rather than by persistent begging.

Calcium should be available through whole prey, cuttlebone, or appropriate supplementation. Do not use mammal meat, dog food, cat food, bread, dairy, or fatty processed foods.

🩺 Health — warning signs

Common problems include shell rot from a wet basking area, eye and skin irritation from dirty water, obesity from overfeeding, soft shell or poor growth from inadequate UVB/calcium, burns from unsafe heat lamps, and injuries from cohabitation.

Seasonal slowing is possible, but controlled brumation is an advanced procedure for healthy, well-established adults only. Do not cool a juvenile, underweight, sick, parasitized, or newly acquired turtle. A first planned cooling should follow veterinary review and a measured preparation protocol; simply switching off an indoor heater can leave the animal digesting poorly in unstable temperatures. Adult females also require a private box of deep, slightly moist soil-sand substrate for nesting even if housed without a male, because unfertilized eggs can still be produced.

Persistent swelling, floating problems, refusal to eat, wheezing, open-mouth breathing, bleeding, or shell lesions require an experienced reptile veterinarian.