Axolotl Tank Setup Guide for Australia

What an axolotl tank actually needs

Before the shopping list, the principle. An axolotl is a cool water, still water, bottom dwelling animal with delicate skin and a habit of swallowing things. Every decision below follows from that. Long tank not tall. Slow filter not strong. Sand not gravel. Cool not warm. Dim not bright.

Tank size and shape

60 litres is the working minimum for a single adult axolotl. 90 litres is better and is what you need for two. What matters is the footprint rather than the volume, because these animals spend almost all their time on the bottom. A 90 by 45 cm tank is far better than a tall 45 by 45 cm tank holding the same water.

Do not start a juvenile in a large tank thinking you are being generous. A small animal in a big tank struggles to find food. Either start smaller and upgrade, or target feed carefully.

Put a lid on it. Axolotls do occasionally launch themselves out, and a fine mesh or glass lid also slows evaporation.

Filtration

You need one, because a tank without biological filtration cannot process waste. What you do not need is power. A sponge filter driven by an air pump is genuinely excellent for axolotls, cheap, gentle and full of bacteria. A canister or hang on filter also works provided you slow the outflow, using a spray bar aimed at the glass, a sponge over the nozzle, or a baffle made from a plastic bottle.

Test for current by watching the animal. An axolotl sitting with gills swept back and pinned against the glass is fighting flow. A relaxed axolotl has gills held forward.

Cycling, the step people skip

This is the most important section on this page. A new aquarium has no bacteria. Fish and amphibians excrete ammonia, which is toxic. In an established tank, one group of bacteria converts ammonia to nitrite, and a second converts nitrite to nitrate, which is far less harmful and removed by water changes. Building those colonies takes four to eight weeks.

The process, briefly. Set the tank up completely with filter running. Add a source of ammonia, either bottled pure ammonia or a small pinch of fish food to rot. Test every couple of days with a liquid test kit, not strips. You will see ammonia rise then fall as nitrite appears, then nitrite fall as nitrate appears. When you can add ammonia and see it read zero along with nitrite within 24 hours, the tank is cycled.

Shortcuts that genuinely help: a seeded cycled filter or media from an established tank, and bottled bacteria. Shortcuts that do not: adding the animal early and hoping.

Substrate

Fine sand or bare glass. Nothing else. Axolotls hunt by suction and will inhale gravel along with food, and impaction from swallowed gravel is one of the most common preventable deaths in the hobby. Fine sand passes through the gut without issue. Bare glass is the safest and easiest to clean, though some keepers find it makes the animal less settled and it does make sand sifting behaviour impossible.

If you use sand, choose a genuinely fine grade, not a coarse aquarium gravel sold as sand.

Temperature, and the Australian summer

Hold the water at 16 to 18 degrees. Under 20 is comfortable, above 22 is stressful, above 24 is dangerous. Nothing else on this page matters as much in an Australian house.

Work through the options in cost order. First, placement. The coolest interior room, away from western sun, on a lower floor if you have one. This is free and it is the most effective change most people can make. Second, a fan across the water surface. Evaporative cooling will pull two to four degrees out of a tank for the price of a desk fan, though you will need to top up water more often. Third, an aquarium chiller at $300 to $600, AUD which removes the problem entirely and is close to mandatory in Brisbane and Perth.

Frozen bottles rotated through the tank are a short term rescue for a heat spike, not a plan. They cause swings, and swings are themselves stressful.

Do not use an aquarium heater. It is the opposite of the problem.

Lighting and decor

Axolotls have no eyelids and dislike bright light. No lighting is needed at all. If you want a light for plants or for viewing, keep it dim and on a short cycle, and make sure there is a hide the animal can retreat into.

Give at least one cave or length of pipe big enough for the whole animal. Avoid anything sharp, and avoid ornaments with small openings a growing axolotl could get stuck in. Live plants are fine. Java fern, anubias and moss all tolerate cool water and low light and do not need substrate rooting. See our aquarium plants for cool water species that suit an axolotl tank.

Water parameters and maintenance

Use dechlorinated tap water. Australian tap water is treated with chlorine or chloramine and both are harmful, so a standard aquarium dechlorinator is required. Target pH between 7.0 and 7.6, which most Australian tap water sits within naturally. Ammonia and nitrite must read zero. Nitrate below 40 ppm.

Change around 20 percent weekly, matching the temperature of the new water to the tank. Siphon waste off the bottom while you do it. Do not clean the filter media in tap water, rinse it in the old tank water you have just removed, or you will kill the bacteria you spent weeks growing.

What it all costs

Tank $120 to $250, AUD filter $50 to $120, AUD sand $20 to $40, AUD hide and decor $30 to $80, AUD thermometer and liquid test kit $40 to $70, AUD dechlorinator and starter bacteria $30. That is roughly $300 to $400 AUD before cooling. A chiller adds $300 to $600 AUD. Full cost comparison including the animal is on our axolotl price Australia page.

Order of operations

Buy and assemble the tank. Start the cycle. While it cycles, read what do axolotls eat and the axolotl care guide. Confirm the tank holds temperature through a warm week. Only then choose your animal. A wild type axolotl is the most forgiving first choice.