Eheim Jager 250W Submersible Aquarium Heater
The Eheim Jager 250W Submersible Heater is a high-performance aquarium heater designed for larger tanks that require stable, accurate temperature control. Each unit is laboratory calibrated to ensure precision, helping maintain ideal conditions for fish, plants, and invertebrates.
Built with shatterproof, shock-resistant glass, the Eheim Jager heater is fully submersible and trusted worldwide for its quiet operation, durability, and long service life.
Key Features & Benefits
250W heater for medium to large aquariums
Laboratory calibrated for accuracy
Fully submersible design
Shatterproof, shock-resistant glass
Adjustable temperature control
Automatic shut-off when removed from water
Suitable for freshwater & saltwater aquariums
Recommended Tank Size
-
Ideal for: ~6590 gallon aquariums
(Depends on room temperature and tank insulation)
💡 For very large tanks, consider using two heaters for redundancy.
Temperature Range
- Adjustable Range: 6593°F (1834°C)
- Easy-to-read calibration ring for precise adjustment
Stable temperatures reduce stress and disease risk.
Installation Tips
- Place near filter outflow for even heat distribution
- Fully submerge before plugging in
- Allow heater to acclimate 1520 minutes before powering on
- Use a thermometer to verify temperature accuracy
⚠️ Handle glass carefully during installation.
Compatible Aquariums
Freshwater aquariums
Saltwater & reef aquariums
Planted tanks
African cichlid tanks
Quarantine & hospital tanks
Product Details
- Brand: Eheim
- Model: Jager
- Wattage: 250 Watts
- Type: Submersible Aquarium Heater
- Material: Shatterproof glass
- Aquarium Type: Freshwater & Saltwater
FAQs Eheim Jager 250W Heater
Q: Is this heater accurate?
A: Yes. Each heater is lab calibrated for precision.
Q: Can it be installed horizontally?
A: Yes, as long as it is fully submerged.
Q: Is it safe for reef tanks?
A: Yes. It is reef-safe when used properly.
Q: Does it turn off if removed from water?
A: Yes. It has an automatic safety shut-off.
Q: Do I need a heater guard?
A: Recommended for tanks with large or aggressive fish.
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