Health & Common Issues

← Back to site

Signs of a Healthy Axolotl

Before worrying about illness, know what healthy looks like. A healthy axolotl will:

• Have full, fluffy, forward-facing gills with good coloration
• Be alert and responsive to movement near the tank
• Strike at food eagerly and eat consistently
• Rest calmly on the bottom or on a hide — not frantically swimming or floating
• Have clear eyes, smooth skin, and intact limbs and tail

Fungal Infections

Fungal infections are the most common health issue in axolotls, appearing as white, fluffy, cotton-like growth on the gills, skin, or limbs. They are almost always caused by poor water quality or injury.

Treatment

1. Test your water immediately — fungus is a symptom of an underlying water quality problem
2. Do a 30% water change with dechlorinated, temperature-matched water
3. Salt bath: Mix 1 tablespoon of non-iodized aquarium salt per gallon in a separate container. Place the axolotl in the salt bath for 10–15 minutes, then return to the main tank. Repeat once daily for 3–5 days.
4. Tea tree / Indian almond leaves: Adding Indian almond leaves to the tank provides mild antifungal properties and is gentle enough for continuous use.
5. If infection spreads or does not improve within 5 days, consult an exotic vet.

The Fridging Protocol

Fridging is a technique used to treat sick axolotls by temporarily housing them at a very cold temperature (39–46°F / 4–8°C). At this temperature, the axolotl’s immune system is suppressed but so is the growth of most pathogens. It also triggers a mild fast that can help the body recover. It is used for fungal infections, bacterial infections, bloat, and general illness.

How to Fridge

1. Set up a clean container (a plastic storage tub works well) with dechlorinated, treated water
2. Place in a refrigerator set to 39–46°F — a dedicated mini fridge is ideal
3. Do a 100% water change daily using fresh dechlorinated water at the same temperature
4. Do not feed during fridging
5. Fridge for 1–2 weeks depending on severity
6. Gradually warm the animal back up before returning to the main tank

Gill Deterioration

Gill stalks shortening, gill filaments curling forward, or gills becoming pale and sparse are signs of chronic stress, poor water quality, or nutritional deficiency. This is not a disease but a symptom.

• Test water and correct any issues immediately
• Increase water change frequency
• Improve diet — add live blackworms if not already feeding them
• Ensure the animal has a dark, quiet place to rest undisturbed

With improved conditions, gill filaments will often grow back within 4–8 weeks.

Bloat / Floating

If your axolotl is floating involuntarily or the abdomen appears swollen, this may indicate intestinal gas, impaction, or organ issues. Mild cases often respond to fridging. Severe or persistent cases require a vet.

Red Leg / Bacterial Infection

Reddening of the skin, particularly on the legs and underbelly, is a sign of bacterial infection (often Aeromonas sp.). This is a serious condition that requires prompt action.

• Isolate the animal immediately
• Begin fridging to slow bacterial growth
• Do daily 100% water changes in the isolation container
• Seek veterinary treatment — bacterial infections often require antibiotics

Medications to Avoid