Reeves' Turtle Care Guide (Chinese Pond Turtle)

How to keep Mauremys reevesii: a hardy semi-aquatic Chinese pond turtle that basks, needs UVB, warm clean water and lives 20+ years in good care.

Overview

The Reeves' turtle (Mauremys reevesii), also called the Chinese pond turtle, is a semi-aquatic species recognised by a dark brown, olive or black carapace bearing three distinct longitudinal keels. It is hardy and breeds well in captivity, which makes it a popular and forgiving species, but it still requires a properly heated and filtered aquatic setup.

Natural Range & Size

Mauremys reevesii is native to China and Korea, with introduced populations in Japan, Taiwan and East Timor. In the wild it inhabits marshes, shallow ponds, streams and canals with muddy or sandy bottoms. Most captive Reeves' turtles stay around 5-6 inches (13-15 cm), though larger wild forms can reach roughly 9 inches. Males over about seven years old may turn entirely black (melanistic).

Aquatic Setup & Filtration

Reeves' are not strong swimmers, so water depth should be roughly 1.5 to 3 times the shell length rather than excessively deep. A single adult is comfortable in about a 40-gallon tank, providing 20 gallons of water plus space for a basking platform. Maintain clean, well-filtered water; a powerful canister or external filter is recommended to cope with the waste turtles produce.

Basking & UVB / Temperature

• Water temperature: about 70-80°F (21-27°C).
• Ambient air: roughly 75-85°F (24-29°C).
• Basking spot: around 85-95°F (29-35°C) over a dry haul-out.
• UVB: a T5 HO 5.0/6% tube above the basking area on a 12-hour cycle, replaced every 6-12 months.

These turtles actively leave the water to bask on rocks or logs, so a stable, easily accessible dry platform under both heat and UVB is essential for shell health and vitamin D3 synthesis.

Diet

Reeves' turtles are omnivores. Some populations are durophagous, eating hard-shelled prey. In captivity, base the diet on a quality commercial aquatic-turtle pellet supplemented with protein (insects, worms, the occasional fish) and leafy greens or aquatic plants, adjusting plant content upward as the turtle matures.

Health & Longevity

With correct heat, UVB and clean water, Reeves' turtles commonly live 15-25+ years. The main husbandry-related problems are shell and respiratory issues caused by inadequate basking, missing UVB or poor water quality, all of which are preventable with proper setup.

Common Mistakes

• Treating them as fully aquatic and omitting a proper dry basking area.
• Skipping UVB or letting the bulb expire, leading to soft shell and metabolic bone disease.
• Water too deep for a weak swimmer.
• Under-filtering, which fouls the water and invites infection.