Axolotl Care: The Walking Fish That Needs Cold, Clean Water
Not Actually a Fish
The axolotl is a neotenic salamander — retaining its larval form through adulthood, living entirely underwater. Many tropical fish care requirements are wrong for axolotls.
Temperature: The Most Critical Parameter
Axolotls are cold-water animals. Optimal temperature range: 60-68°F. At temperatures above 72°F, axolotls experience chronic stress, immune suppression, and organ damage. Sustained exposure above 74°F is fatal. In most homes, an aquarium chiller is a necessity, especially from late spring through early fall.
Tank Size and Setup
A single adult axolotl needs a minimum of 20 gallons. Use coarse sand if any substrate — never gravel (impaction risk). Bare-bottom tanks are easiest to clean. Multiple hides are standard. No tankmates — fish nip at gills, and the axolotl will eat small fish.
Filtration and Flow
Filtration is essential but must be gentle — axolotls experience stress in strong currents. Use a sponge filter or baffle the output of a canister filter.
