Axolotl tanks must prioritize stability, space, and simplicity. Decorative or high-flow aquarium designs common in fishkeeping are often inappropriate.
A well-designed tank minimizes stress, supports water quality, and reduces long-term maintenance issues.
Tank Size
- Minimum for one adult: 20 gallons (long footprint preferred)
- Recommended: 30+ gallons for improved stability
Larger volumes dilute waste more effectively and resist rapid parameter swings.
Filtration
Filtration must balance biological capacity with low flow.
Recommended
- Sponge filters
- Canister filters with flow diffusers
- Hang-on-back filters with baffles
Avoid
- Strong directional currents
- Unrestricted powerheads
Axolotls prefer calm water. Excess flow causes chronic stress and gill curl.
Substrate
Safest Options
- Bare bottom
- Fine sand (very fine grain only)
Avoid
- Gravel
- Pebbles
- Decorative stones
Any object small enough to fit in the mouth is a potential impaction risk.
Hides and Environment
Axolotls require shelter.
- Provide at least one hide per animal
- Use smooth, inert materials
- Avoid sharp edges
Lighting should be minimal. Axolotls do not require UVB and are sensitive to bright illumination.