Eheim Jager Thermocontrol Aquarium Heater 250W (3618010)

The Eheim Jager 250W is a precision electronic aquarium heater for large freshwater and marine aquariums from 400L up to 600L. A further development of the legendary Eheim Jäger heating rod — one of the most trusted aquarium heaters in the world — the Jager combines advanced electronic temperature control with a special laboratory glass jacket for even, accurate heat distribution. Manufactured in Germany and backed by a 3-year warranty, the Eheim Jager sets the benchmark for aquarium heating reliability and precision.

Set your desired temperature between 18°C and 34°C using the easy dial control, and the electronic thermostat maintains it with an accuracy of ±0.5°C. A simple recalibration function (±2°C) allows fine adjustment using an external thermometer for maximum temperature precision. The Thermo Safety Control automatically shuts the heater off if it is operated outside of water — protecting both the heater and the aquarium.

Key Features

• Electronic temperature control: Maintains set temperature with a precision of ±0.5°C — no readjustment required once set
• Adjustable temperature range: Set from 18°C to 34°C using the manual dial
• Simple recalibration: Easy ±2°C recalibration for precise temperature matching using an external thermometer
• 250W heating output: Suitable for large aquariums from 400L to 600L
• Special laboratory glass jacket: Increases heating surface, acts as a heat shield, and ensures even, uniform heat distribution throughout the water column — completely free from pollutants, resistant to chemical and biological substances, no fissures or hair cracks
• Thermo Safety Control: Automatic dry-run shut-off if operated out of water — protects both the heater and the aquarium
• Fully submersible: Completely watertight — can be fully immersed in water
• Control lamp indicator: Clearly shows when the heater is actively heating
• 44cm length: Suitable for aquariums with adequate depth for full submersion
• Double suction cup holder included: For secure, adjustable positioning inside the aquarium
• 170cm cable length: Generous cable for flexible placement
• Freshwater and marine compatible: Suitable for all aquarium water types
• Made in Germany: Eheim's trademark build quality, materials, and reliability
• 3-year warranty: Backed by Eheim's industry-leading guarantee

Compatibility

• Suitable for: Freshwater and marine aquariums from 400L to 600L
• Adjustable temperature: 18°C to 34°C
• Power: 250W / 220–240V

Product Details

• Brand: Eheim
• Product Code: 3618010
• Type: Electronic Aquarium Heater
• Wattage: 250W
• Temperature Range: 18°C – 34°C (adjustable)
• Temperature Accuracy: ±0.5°C
• Aquarium Size: 400L – 600L
• Length: 44cm
• Cable Length: 170cm
• Warranty: 3 years
• Made in: Germany
• Suitable For: Freshwater and marine aquariums

The Eheim Jager 250W is ideal for aquarium keepers managing large freshwater or marine aquariums who want precise, reliable electronic temperature control from one of the most trusted heater brands in the world.