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Anonymous
Axolotls live at temperatures of 1420°C (5468°F), preferably 1718°C (6264°F). Lower temperatures slow down their metabolism, although temperatures around 10°C (50°F) are a panacea when it comes to treating disease. Higher temperatures can lead to stress and increased appetite; use of a cooling aggregate is strongly recommended. Tapwater should be treated with a dechlorinator before the animal is introduced into it, as chlorine is harmful. A single typical axolotl should be kept in a normal 10 U.S. gallon tank (44 litres) with around 150 mm (6 inches) of water. A power filter or underwater filter run by an airpump can be used, though water flow should be kept to a minimum to avoid stressing the animal. A 20% water change should be done every week, with debris being siphoned from the bottom. Small gravel should be avoided, as the axolotl can mistakenly ingest the rocks, leading to stress and gas. Floating plants should be provided for juveniles as a hiding place, and small caves should likewise be provided for adults. No light is necessary as axolotls are nocturnal. Axolotls will spend a majority of the time on the bottom of the tank (floating is a sign of stress and illness), so design accordingly.
In laboratory colonies, adult axolotls are often housed three to a one gallon container, and water changes are performed more regularly. Salts, such as Holtfreter's solution, are usually added to the water to prevent infection.
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