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Critical - act now

Erratic swimming, twitching, or glass-surfing — nothing new added

This looks like: a temperature spike — axolotls react quickly and visibly once water gets too warm

Do this firstCheck the thermometer right now — if it reads above roughly 22-24°C, this is very likely the cause and needs immediate action.

Why this happens

With no new products or decor to explain sudden erratic behaviour, temperature is the next most common and most urgent cause. Axolotls are cold-water animals with a narrow comfort range, and heat stress shows up fast as distressed, erratic swimming, not a gradual decline.

How sure are we? Erratic swimming with no other obvious trigger, especially during warm weather or after any change to cooling equipment, points strongly at temperature — check it first.

What to do right now

  1. Check the thermometer right now — if it reads above roughly 22-24°C, this is very likely the cause and needs immediate action.
  2. Cool the tank fast: ice packs in a sealed bag floated in the water, a fan blowing across the surface, or moving the tank to a cooler room if that's feasible.
  3. If you rely on a chiller, check it's actually running and set correctly — a failed or misconfigured chiller is a common cause of this exact scenario.
  4. Increase surface agitation to help with oxygen, since warm water holds less of it on top of the direct heat stress.
  5. Once temperature is back in range, expect behaviour to calm within a few hours — if it doesn't, treat this as escalating and involve a vet.

What not to do

Stop it happening again

Invest in a proper aquarium chiller if your room runs warm, rather than relying on fans and ice packs as your only defence.

If that doesn't fix it

If this happens repeatedly in warm weather, a proper aquarium chiller is worth the investment rather than relying on fans and ice packs as your main defence — see our care guide's temperature section.

Catch this earlier next time — log your axolotl's water parameters in App-aquatic. Free forever.

← Back to Axolotl SOS diagnostic

This isn't veterinary advice - it's a directional read to help you decide your next step, based on the most common causes and independently checked sources (Merck Veterinary Manual, PetMD, established amphibian husbandry references). We can't see your axolotl, so pair it with a liquid test kit and clear photos, and see an exotic or aquatic vet for anything serious or not improving.