Eheim Jäger TruTemp Submersible Heater
Precisely regulated, constant water temperature is very important for the comfort and success of your aquarium inhabitants. The Jäger TruTemp adjustable heater is an ultra-modern electronic thermal device offering today’s best technology. Designed for use in both freshwater and saltwater aquariums, Jäger TruTemp fully-submersible heaters include great features such as:
- Shatterproof Glass Construction– Made with laboratory-grade glass, TruTemp heaters are free of pollutants, resistant to chemical and biological substances, and able to withstand extreme temperature fluctuations. Their glass jackets also enlarge the heating surface and ensure even heat distribution.
- TruTemp Dial– Temperature can be precisely adjusted from 18° to 30°C.
| Specification | Detail |
|---|---|
| Heater Type | Submersible |
| Temperature Range | 18° to 30°C |
| Material | Shatterproof laboratory-grade glass |
| Usage | Freshwater and saltwater aquariums |
FAQ
What is the temperature range of the Jäger TruTemp heater?
The temperature range is from 18° to 30°C.
Is the heater suitable for both freshwater and saltwater aquariums?
Yes, the Jäger TruTemp heater is designed for use in both freshwater and saltwater aquariums.
What makes the glass construction special?
The heater features laboratory-grade shatterproof glass that is free of pollutants, resistant to chemical and biological substances, and can withstand extreme temperature fluctuations. The glass also increases the heating surface for even heat distribution.


Angela Nash –
The heater maintains a steady temperature in my 100-gallon saltwater tank. The glass is sturdy and the dial is easy to adjust. My fish have shown no signs of stress since I installed it.
Andrew Baker –
Works well in my freshwater tank. The temperature stays consistent even during temperature drops. The glass feels solid and the design is simple and effective.
Elizabeth James –
I’ve used this heater for over a year in a reef tank. It’s reliable and the temperature control is precise. No overheating or fluctuations reported.