EHEIM Jager Thermocontrol Heaters

EHEIM Jager Thermocontrol Heaters

EHEIM Jager Thermocontrol Heaters 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.

EHEIM 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.

Key Benefits

• Precise, adjustable temperature: 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.
• Tight accuracy: The thermostat works to within ±0.5°C, so the water stays close to your chosen setting instead of swinging up and down.
• Easy recalibration: 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.
• Even heat distribution: 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.
• Thermo Safety Control: 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.
• Fully submersible: The heater can be placed completely underwater, which gives you more freedom when positioning it in the tank.
• Freshwater and saltwater use: It is equally at home in a community tropical tank, a cichlid setup or a reef or marine aquarium.
• Stable conditions for fish: Tropical and sub-tropical fish thrive when water temperatures stay consistent. This heater provides that stability without any need for unconventional heating methods.

Innovative Glass Jacket Design

• It is made from pollutant-free laboratory glass.
• It resists chemical and biological substances found in aquarium water.
• It has no fissures, which avoids the condensation problems such fissures can cause.
• It withstands extreme temperature fluctuations, which makes the heater durable and reliable over the long term.

How to Use

• Choose the model that matches your aquarium volume. See Available Sizes below.
• Fix the heater inside the tank using the double suction cup holder. Because it is fully submersible, it can sit completely below the waterline.
• Run the 170 cm (67") cable to your power point. The generous length gives you room to reach plugs placed beside or behind the cabinet.
• Set your target temperature between 18°C and 34°C. If needed, recalibrate by up to ±2°C so the reading matches your thermometer.

Suitable For

• Freshwater tropical and sub-tropical aquariums
• Saltwater and marine aquariums
• Aquariums from 20 litres (5.3 gal) up to 1000 litres (264 gal), depending on the model chosen
• Fishkeepers who want steady temperatures through cooler South African nights and seasonal changes, for example during Highveld winters

Specifications

• Type: Electronic thermostatic aquarium heater
• Temperature range: 18°C – 34°C
• Accuracy: ±0.5°C
• Recalibration: ±2°C
• Jacket: Pollutant-free laboratory glass, acting as both heating surface and heat shield
• Safety: Thermo Safety Control automatic dry-run shut-off
• Installation: Fully submersible, with double suction cup holder
• Cable length: 170 cm (67")
• Water type: Freshwater and saltwater
• Range coverage: 20 litres (5.3 gal) to 1000 litres (264 gal)

Available Sizes

The EHEIM Jager Thermocontrol range is available in the following models:

• 50w: For Aquariums 25L-60L
• 100w: For Aquariums 100L-150L
• 150w: For Aquariums 200L-300L
• 200w: For Aquariums 300L-400L
• 250w: For Aquariums 400L-600L
• 300w: For Aquariums 600L-1000L

Frequently Asked Questions

What temperature range can the EHEIM Jager heater be set to?
You 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.

Which wattage should I choose for my aquarium?
Match 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.

Can I use this heater in a marine or reef tank?
Yes. The heater is suitable for both freshwater and saltwater aquariums. Its laboratory-glass jacket resists chemical and biological substances.

What happens if the water level drops below the heater?
The built-in Thermo Safety Control switches the heater off automatically if it runs dry.

Can the heater be fully submerged?
Yes. It is completely submersible and mounts with a double suction cup holder. The 170 cm (67") cable gives you flexibility when placing it.

Why does the glass jacket matter?
The 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.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

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Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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• Bob Box: Collect within 2 days of receiving your collection notification.
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