Reptile · Colubrid
Diamondback water snake care guide
Nerodia rhombifer
The diamondback water snake is a intermediate-level colubrid from S central United States, NE Mexico. Adults reach 75–150 cm and live 10–15 years in captivity. Heavy-bodied and large; needs a big water area. Solitary.
- Enclosure 150 × 60 × 60 cm
- Temp Warm 28–30°C, cool 24°C
- Humidity 60–80%
How much does a diamondback water snake cost in Canada?
Diamondback water snake quick facts
- Skill level
- Intermediate
- Adult size
- 75–150 cm
- Lifespan
- 10–15 years
- Activity
- Diurnal
- Native range
- S central United States, NE Mexico
- Minimum enclosure
- 150 × 60 × 60 cm (59 × 24 × 24 in, ≈ 143 US gal)
- Housing
- Best kept alone.
- Temperature
- Warm 28–30°C, cool 24°C
- Humidity
- 60–80%
- UVB
- Recommended
- Diet
- Piscivore – fish, frogs, scented mice
- Bioactive style
- Semi-aquatic (paludarium)
Diamondback water snake enclosure & bioactive setup
Give one adult at least 150 × 60 × 60 cm (59 × 24 × 24 inches). Best kept alone. This species suits a semi-aquatic (paludarium) bioactive build.
- Leaf litter2 cm
- Jurassic ABG Terrarium Mix8 cm
- Drainage – clay bio balls4 cm
Quantities assume about half the floor is land. The water half needs a filter and regular partial water changes.
Temperature: Warm 28–30°C, cool 24°C. Humidity: 60–80%. UVB: Recommended.
What does a diamondback water snake eat?
Piscivore – fish, frogs, scented mice. Feed every 5–7 days.
Handling, temperament & health
Defensive; bites and musks readily.
Health watch: Watch for blister disease and thiamine deficiency.
Cleaning & maintenance schedule
Daily
- Check water and air temperature; feed according to species.
Weekly
- Change 20–30% of the water with dechlorinated water.
- Rinse filter sponge in old tank water (never tap water) as needed.
Monthly
- Top up leaf litter on land; prune plants at the waterline.
Yearly
- Service the pump/filter fully.
Recommended for a diamondback water snake bioactive
Quantities are for one minimum-size enclosure (150 × 60 × 60 cm).
Clay Bio Balls
Drainage layer, 4 cm
Jurassic ABG Terrarium Mix
Bioactive soil layer, 8 cm
Almond Leaves Dried 15/Pack
Leaf litter – food and cover for the clean-up crew
Fresh Sphagnum Moss Container
Moss for humidity pockets and planting
Malaysian Drift Wood
Bridges water and land; easy exit from the water
Cork Bark Flats
Shelter on the land section
Diamondback water snake FAQ
Is the diamondback water snake good for beginners?
The diamondback water snake is best for keepers with some experience (intermediate). Defensive; bites and musks readily.
What size enclosure does a diamondback water snake need?
At least 150 × 60 × 60 cm (about 59 × 24 × 24 inches, roughly 143 US gallons) for one adult. Best kept alone.
How much does a diamondback water snake cost in Canada?
Typically $80–200 CAD to buy, about $950–1740 CAD for a complete bioactive enclosure, and $200–350 CAD a year to keep.
What temperature and humidity does a diamondback water snake need?
Temperature: Warm 28–30°C, cool 24°C. Humidity: 60–80%.
What does a diamondback water snake eat?
Piscivore – fish, frogs, scented mice. Feed every 5–7 days.
Similar species
This care sheet is general guidance from One Bioactive, not veterinary advice. Needs vary with age, locality and individual animals – confirm with your breeder and an exotics vet. Prices are typical Canadian ranges in CAD and change over time.