Axolotl (Ambystoma mexicanum) Care

Species Overview

Common Name: Axolotl, Mexican Walking Fish
Scientific Name: Ambystoma mexicanum
Adult Size:9–12 inches
Lifespan:10–15+ years in captivity with proper care

Axolotls are fascinating aquatic salamanders native to the lakes of central Mexico. Unlike most amphibians, they remain fully aquatic and retain their feathery external gills throughout life.

Housing

Tank Size

• Single Axolotl: 20-gallon long aquarium minimum

• Groups: Add at least 10 gallons per additional axolotl

• Provide ample floor space — length is more important than height

Tank Setup

• Filtration: Use a low-flow filter (sponge or canister) to avoid strong currents

• Cover: Secure lid to prevent escapes

• Décor: Smooth hides (PVC pipes, caves) and silk or live plants for cover — avoid sharp décor that could injure delicate skin

Water Parameters

Axolotls are very sensitive to water quality.

• Temperature: 60–68°F (cool water species — avoid temps above 72°F), use an aquarium chiller if needed.

• pH: 6.5–8.0

• Ammonia/Nitrite: 0 ppm (toxic even in small amounts)

• Nitrate: <40 ppm

Water Maintenance

• Cycle the aquarium before adding axolotls

• Perform partial water changes (20–30%) weekly

• Use dechlorinated water (treat with a water conditioner)

• Monitor water parameters with a liquid test kit

Substrate

• Best:Bare-bottom tank (easy to clean) or fine sand

• Avoid:Gravel or small pebbles (can cause impaction if swallowed)

Diet

Axolotls are carnivorous and need a high-protein diet.

Staple Diet

• High-quality sinking axolotl pellets (e.g., Hikari Carnivore Pellets, Northfin Axolotl Pellets)

Variety Foods

• Nightcrawlers/earthworms (best fresh food option)

• Bloodworms, blackworms (frozen or live)

• Silverside fish pieces (occasionally)

Feeding Guidelines

• Juveniles: Feed daily

• Adults: Feed every 2–3 days

• Remove uneaten food after a few hours

Tank Mates

• Best kept alone or with other similarly sized axolotls

• Avoid fish (may nip gills) and anything small enough to be swallowed

Temperature Control

Axolotls require cool water — overheating is a common cause of illness.

• Keep the tank in a cool room away from windows or heat sources

• Use an aquarium chiller or fan during hot months if needed

Handling

Avoid handling axolotls — they have delicate skin and are easily stressed. Use a soft net or container if you need to move them.

Common Health Concerns

• Heat Stress: Temperatures above 72°F can lead to illness or death

• Ammonia Toxicity: Keep water well-filtered and cycled

• Fungal Infections: White fuzzy growth on gills or skin — requires prompt veterinary care

• Injuries: Axolotls can regenerate limbs, but wounds should still be monitored for infection

Key Points

• Provide a cool, clean, fully aquatic setup with gentle filtration

• Feed a high-protein, carnivorous diet of pellets and worms

• Monitor water quality regularly — axolotls are sensitive to toxins

• Avoid handling except when necessary

For more in-depth information about axolotl care, visit Axolotl.org.

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