{"product_id":"eheim-jager-thermocontrol-heaters","title":"EHEIM Jager Thermocontrol Heaters","description":"\u003ch2\u003eEHEIM Jager Thermocontrol Heaters\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eEHEIM Jager Thermocontrol Heaters\u003c\/strong\u003e are fully submersible electronic aquarium heaters that hold water at a precise temperature anywhere between 18°C and 34°C. They suit both freshwater and saltwater aquariums and give South African fishkeepers a dependable way to keep tropical and sub-tropical fish in stable water all year round. The range covers aquariums from 20 litres (5.3 gal) up to 1000 litres (264 gal), so there is an option for small home setups and large display tanks alike.\u003c\/p\u003e\n\n\u003cp\u003eEHEIM describes this as more than a basic heating rod. It is an advanced electronic thermal device built on the pioneering work of engineer Eugen Jäger, whose name it carries. EHEIM presents it as a significant step forward from the traditional aquarium heating rod and as an example of German engineering focused on precision and safety. Because the whole range shares one design, the features below apply to every wattage in the line.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise, adjustable temperature:\u003c\/strong\u003e You can set the water temperature anywhere from 18°C to 34°C, which covers the needs of most tropical, sub-tropical and marine species.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTight accuracy:\u003c\/strong\u003e The thermostat works to within ±0.5°C, so the water stays close to your chosen setting instead of swinging up and down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy recalibration:\u003c\/strong\u003e The heater can be recalibrated by ±2°C. This lets you fine-tune it to match your own aquarium thermometer and build a tailor-made environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEven heat distribution:\u003c\/strong\u003e A jacket made from special laboratory glass enlarges the heating surface and also acts as a heat shield. Heat spreads evenly and efficiently through the aquarium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermo Safety Control:\u003c\/strong\u003e The heater switches off automatically if it runs dry. This protects the unit if the water level drops or it is accidentally lifted out while powered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully submersible:\u003c\/strong\u003e The heater can be placed completely underwater, which gives you more freedom when positioning it in the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and saltwater use:\u003c\/strong\u003e It is equally at home in a community tropical tank, a cichlid setup or a reef or marine aquarium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable conditions for fish:\u003c\/strong\u003e Tropical and sub-tropical fish thrive when water temperatures stay consistent. This heater provides that stability without any need for unconventional heating methods.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eInnovative Glass Jacket Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt is made from pollutant-free laboratory glass.\u003c\/li\u003e\n\u003cli\u003eIt resists chemical and biological substances found in aquarium water.\u003c\/li\u003e\n\u003cli\u003eIt has no fissures, which avoids the condensation problems such fissures can cause.\u003c\/li\u003e\n\u003cli\u003eIt withstands extreme temperature fluctuations, which makes the heater durable and reliable over the long term.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChoose the model that matches your aquarium volume. See Available Sizes below.\u003c\/li\u003e\n\u003cli\u003eFix the heater inside the tank using the double suction cup holder. Because it is fully submersible, it can sit completely below the waterline.\u003c\/li\u003e\n\u003cli\u003eRun the 170 cm (67\") cable to your power point. The generous length gives you room to reach plugs placed beside or behind the cabinet.\u003c\/li\u003e\n\u003cli\u003eSet your target temperature between 18°C and 34°C. If needed, recalibrate by up to ±2°C so the reading matches your thermometer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater tropical and sub-tropical aquariums\u003c\/li\u003e\n\u003cli\u003eSaltwater and marine aquariums\u003c\/li\u003e\n\u003cli\u003eAquariums from 20 litres (5.3 gal) up to 1000 litres (264 gal), depending on the model chosen\u003c\/li\u003e\n\u003cli\u003eFishkeepers who want steady temperatures through cooler South African nights and seasonal changes, for example during Highveld winters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Electronic thermostatic aquarium heater\u003c\/li\u003e\n\u003cli\u003eTemperature range: 18°C – 34°C\u003c\/li\u003e\n\u003cli\u003eAccuracy: ±0.5°C\u003c\/li\u003e\n\u003cli\u003eRecalibration: ±2°C\u003c\/li\u003e\n\u003cli\u003eJacket: Pollutant-free laboratory glass, acting as both heating surface and heat shield\u003c\/li\u003e\n\u003cli\u003eSafety: Thermo Safety Control automatic dry-run shut-off\u003c\/li\u003e\n\u003cli\u003eInstallation: Fully submersible, with double suction cup holder\u003c\/li\u003e\n\u003cli\u003eCable length: 170 cm (67\")\u003c\/li\u003e\n\u003cli\u003eWater type: Freshwater and saltwater\u003c\/li\u003e\n\u003cli\u003eRange coverage: 20 litres (5.3 gal) to 1000 litres (264 gal)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable Sizes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe EHEIM Jager Thermocontrol range is available in the following models:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e50w: For Aquariums 25L-60L\u003c\/li\u003e\n\u003cli\u003e100w: For Aquariums 100L-150L\u003c\/li\u003e\n\u003cli\u003e150w: For Aquariums 200L-300L\u003c\/li\u003e\n\u003cli\u003e200w: For Aquariums 300L-400L\u003c\/li\u003e\n\u003cli\u003e250w: For Aquariums 400L-600L\u003c\/li\u003e\n\u003cli\u003e300w: For Aquariums 600L-1000L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat temperature range can the EHEIM Jager heater be set to?\u003c\/strong\u003e\u003cbr\u003e\nYou can set it anywhere from 18°C to 34°C. It holds the water to within ±0.5°C of your setting, and you can recalibrate it by ±2°C if needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich wattage should I choose for my aquarium?\u003c\/strong\u003e\u003cbr\u003e\nMatch the model to your tank volume. The 50w suits 25L-60L, the 100w suits 100L-150L and the 150w suits 200L-300L. The 200w covers 300L-400L, the 250w covers 400L-600L and the 300w covers 600L-1000L.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this heater in a marine or reef tank?\u003c\/strong\u003e\u003cbr\u003e\nYes. The heater is suitable for both freshwater and saltwater aquariums. Its laboratory-glass jacket resists chemical and biological substances.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat happens if the water level drops below the heater?\u003c\/strong\u003e\u003cbr\u003e\nThe built-in Thermo Safety Control switches the heater off automatically if it runs dry.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan the heater be fully submerged?\u003c\/strong\u003e\u003cbr\u003e\nYes. It is completely submersible and mounts with a double suction cup holder. The 170 cm (67\") cable gives you flexibility when placing it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy does the glass jacket matter?\u003c\/strong\u003e\u003cbr\u003e\nThe jacket enlarges the heating surface and acts as a heat shield, so heat is distributed evenly. It is made from pollutant-free, fissure-free laboratory glass that withstands extreme temperature fluctuations.\u003c\/p\u003e","brand":"DARO","offers":[{"title":"50w","offer_id":39308903678006,"sku":"4011708361160","price":770.0,"currency_code":"ZAR","in_stock":false},{"title":"100w","offer_id":39308903710774,"sku":"4011708361184","price":935.0,"currency_code":"ZAR","in_stock":true},{"title":"150w","offer_id":39308903743542,"sku":"4011708361207","price":1299.0,"currency_code":"ZAR","in_stock":true},{"title":"200w","offer_id":39308903776310,"sku":"4011708361214","price":1299.0,"currency_code":"ZAR","in_stock":true},{"title":"250w","offer_id":39308903809078,"sku":"4011708361221","price":1299.0,"currency_code":"ZAR","in_stock":true},{"title":"300w","offer_id":39308903841846,"sku":"4011708361238","price":1299.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/eheim-jager-combined-heaters-advanced-temperature-control-aquarium-electronic-heater.jpg?v=1743702615","url":"https:\/\/jungleaquatics.com\/products\/eheim-jager-thermocontrol-heaters","provider":"Jungle Aquatics Pet Store","version":"1.0","type":"link"}