{"topic_id":"exotic_husbandry_axolotl","category":"exotic-pet-husbandry","context":"---\ntopic_id: exotic_husbandry_axolotl\ncategory: exotic-pet-husbandry\ntitle: \"Husbandry of axolotls and other amphibians (Merck): cool thermal gradient, water temperature\"\nlang: en\nsource: \"Merck Veterinary Manual — Environment and Husbandry for Amphibians (first-hand server-rendered HTML, stripped to text; retrieved 2026-07-29 via curl -A Mozilla/5.0)\"\nsource_file: pdf-raw/merck/amphibians_husbandry.txt\nsource_type: veterinary_reference\ndate_parsed: 2026-07-29\ntokens_estimated: 165\nverification: C1_substring_match\nclaims: 3\nsource_document: \"Merck Veterinary Manual, Environment and Husbandry for Amphibians\"\ncitation:\n  authority: \"Merck Veterinary Manual\"\n  title: \"Husbandry of axolotls and other amphibians (Merck): cool thermal gradient, water temperature\"\n  url: \"https://www.merckvetmanual.com/exotic-and-laboratory-animals/amphibians/environment-and-husbandry-for-amphibians\"\n  retrieved: \"2026-07-29\"\n  ref: \"Merck Veterinary Manual (first-hand HTML, stripped to .txt)\"\n  doc_type: \"professional veterinary reference (first-hand English text)\"\n  needs_review: false\n---\n\n# Husbandry of axolotls and other amphibians (Merck): cool thermal gradient, water temperature\nSource: Merck Veterinary Manual article \"Environment and Husbandry for Amphibians\" (first-hand, retrieved 2026-07-29 via curl, HTML stripped to plain text). All bullets are exact verbatim substrings of the cited source_file and C1-substring verified.\n\n## Husbandry for axolotls and other caudatan amphibians\n- `The POTZ of amphibian species is generally less than the POTZ of reptilians; caudatan species prefer temperatures substantially lower than anuran species.`\n- `Water temperature regulation with water chillers and air conditioning must be considered for enclosures.`\n- `Provision of a thermal gradient within a species POTZ allows most amphibians to self-regulate body temperature.`\n> Yaw , DVM, CertAqV , Texas State Aquarium Last updated: Feb 2026 v3300948 Quarantine | For More Information | Due to amphibians’ unique integument and physiology, their metabolism and immune function is uniquely reliant on a stable environment.\n> Infectious and nutritional diseases are common problems in tropical amphibians kept in suboptimal conditions.\n> The range of temperatures necessary for proper metabolism, called the preferred optimal temperature zone (POTZ), varies among species.\n> The POTZ of amphibian species is generally less than the POTZ of reptilians; caudatan species prefer temperatures substantially lower than anuran species.\n> Water temperature regulation with water chillers and air conditioning must be considered for enclosures.\n> Provision of a thermal gradient within a species POTZ allows most amphibians to self-regulate body temperature.\n> Enclosures should be spot-checked daily with a laser temperature probe, which can be purchased at most hardware or pet stores.\n> Aquatic amphibians may be accommodated in aquariums with areas for swimming.\n> Terrestrial amphibians need a shallow container of water in the enclosure.\n> Moisture may also be provided by incorporating small streams, waterfalls, or ultrasonic humidifiers into enclosures, or by misting frequently with a spray bottle.\n> Organic substrates and refugia that limit water loss can also help provide humidity within microhabitats.\n> Water must be clean and free of toxins such as chlorine, ammonia, nitrite, pesticides, and heavy metals.\n> Chlorine can be removed from tap water by placing the water in a container and circulating it through a carbon filter for ≥ 24 hours before use.\n> The chloramine bond must be split with specific dechlorinating agents (eg, sodium thiosulfate), after which water can be filtered with carbon to remove the chlorine.\n- `Yaw , DVM, CertAqV , Texas State Aquarium Last updated: Feb 2026 v3300948 Quarantine | For More Information | Due to amphibians’ unique integument and physiology, their metabolism and immune function is uniquely reliant on a stable environment.`\n- `Infectious and nutritional diseases are common problems in tropical amphibians kept in suboptimal conditions.`\n- `The range of temperatures necessary for proper metabolism, called the preferred optimal temperature zone (POTZ), varies among species.`\n- `The POTZ of amphibian species is generally less than the POTZ of reptilians; caudatan species prefer temperatures substantially lower than anuran species.`\n- `Water temperature regulation with water chillers and air conditioning must be considered for enclosures.`\n- `Provision of a thermal gradient within a species POTZ allows most amphibians to self-regulate body temperature.`\n- `Enclosures should be spot-checked daily with a laser temperature probe, which can be purchased at most hardware or pet stores.`\n- `Aquatic amphibians may be accommodated in aquariums with areas for swimming.`\n- `Terrestrial amphibians need a shallow container of water in the enclosure.`\n- `Moisture may also be provided by incorporating small streams, waterfalls, or ultrasonic humidifiers into enclosures, or by misting frequently with a spray bottle.`\n- `Organic substrates and refugia that limit water loss can also help provide humidity within microhabitats.`\n- `Water must be clean and free of toxins such as chlorine, ammonia, nitrite, pesticides, and heavy metals.`\n- `Chlorine can be removed from tap water by placing the water in a container and circulating it through a carbon filter for ≥ 24 hours before use.`\n- `The chloramine bond must be split with specific dechlorinating agents (eg, sodium thiosulfate), after which water can be filtered with carbon to remove the chlorine.`\n","sources":["exotic-pet-husbandry — Husbandry of axolotls and other amphibians (Merck): cool thermal gradient, water temperature (retrieved 2026-07-29)"],"source":{"authority":"exotic-pet-husbandry","title":"Husbandry of axolotls and other amphibians (Merck): cool thermal gradient, water temperature","url":"https://www.merckvetmanual.com/exotic-and-laboratory-animals/amphibians/environment-and-husbandry-for-amphibians","retrieved":"2026-07-29","ref":"","doc_type":"official PDF","source_document":"Merck Veterinary Manual, Environment and Husbandry for Amphibians","verification_file":"pdf-raw/merck/amphibians_husbandry.txt"},"source_document":"Merck Veterinary Manual, Environment and Husbandry for Amphibians","source_file":"pdf-raw/merck/amphibians_husbandry.txt","tokens_estimated":165,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}