Eheim Jager TruTemp Submersible Heater Review

Eheim Jager TruTemp Submersible Heater Review

Some people are dog people and others are friends with felines. However, not everyone a high maintenance pet like birds or dogs, but they also don’t want to deal with moody cats, either. So what kind of pet can you get? Fish!

However, when you are creating the perfect environment for your fish, you’ll want to use a heater like the Eheim Jager TruTemp Submersible Heater to regulate the water’s temperature.

Eheim Jager TruTemp Submersible Heater

In today’s review, we are going to take a closer look at the Eheim Jager TruTemp Submersible Heater. We are going to go over the features of the aquarium heater, but we are also going to give you a brief summary of the reviews for the product. At the end, we’ll give you our recommendation on whether or not the heater is worthy of your time and consideration.

About The Product

The Eheim Jager TruTemp Submersible Heater has been designed to create a comfortable environment for the creatures that call your aquarium home. This heater is made from laboratory-grade glass to ensure that it won’t shatter. The heater’s glass jacket creates more surface area so that the heat can be distributed more evenly.

The heater is designed to use in freshwater aquariums as well as saltwater. You can adjust the temperature of the heater by using the TruTemp Dial, which can adjust from 18° to 34° C (65° to 93° F), with an accuracy of +/- . 0.5° C. Notable features of the Eheim Jager TruTemp Submersible Heater include:

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    Fully submersible
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    Thermo safey control protects against running dry
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    Will automatically turn off when water level dips too low
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    TruTemp dial recalibrates the heater for precise temperature regulation
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    Made of shock resistant and shatter proof glass for fresh or marine water
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    On/Off indicator light for at-a-glance monitoring

The heater also features a Thermo-Safety Control mechanism that prevents the heater from “running dry.” With this technology, the heater will automatically shut off when there isn’t any water detected, but it will automatically turn back on when it does detect water.

The heater also features an on/off indicator light. This light makes it easy for you to see when the heater is working without having to stick your hands in the water.

Every Eheim heater comes with a mounting bracket and suction cups. You can easily adjust the mounting brackets and suction cups to any desired placement. The heater system features a long power cord, giving you the freedom to place your aquarium wherever you want.

What Other Say

When looking at what people had to say about the Eheim Jager TruTemp Submersible Heater, a lot of people had positive things to say. Customers commented on this heater’s ability to create even and consistent heat. Although several people were surprised by how long the heater was, they appreciated having the ability to use it either vertically or horizontally.

Eheim Jager TruTemp Submersible Heater In Aquarium

Some were very impressed by the heater’s ability to heat a large 150 gallon aquarium. One person reported their aquarium had reached a “toasty 78.9 degrees” within two hours of installing it.

Many customers commented on the reliability of this heater. Several have said they’ve been using their heater for several years and it continues to work as if it were brand new. Others remarked on the overall construction of the heater.

Some mentioned they replaced the suction cups that came with the heater for larger ones, just to ensure the heater would stay in place. People also liked that the heater has a modern look to it, and it doesn’t look bad in the aquarium.

While this aquarium had a lot of wonderful reviews, there were some people who were not impressed with this purchase. Of the complaints people had, many felt the Eheim brand itself wasn’t what it used to be.

Customers reported they had purchased Eheim products for many years and the overall quality of this aquarium heater was pretty shoddy. Some stated the heater did not heat up to temperature, while others commented their heater would not turn off.

One customer reported the wires had melted away from the body of their heater and water filled the glass heater tube. This caused electricity into the water, literally shocking the fish.

There were a few other customers who reported the heater shorted out after a very short period of time and it killed their fish as a result. In less catastrophic reviews, people reported the heater was not accurate and it was off by as much as 4 degrees.

Final Thoughts

Although not everyone is a dog or cat person, that doesn’t mean you cannot have pets. An aquarium is the perfect opportunity to have a beautiful focal point in their home, but also have some beautiful fish too.

It is important to understand the water in the aquarium needs to be regulated, especially if you love tropical fish. To regulate and heat the water, an aquarium heater like the Eheim Jager TruTemp Submersible Heater is a great option.

We like this heater because it is long! This is the perfect heater for those who have large aquariums and need a way to keep it good and warm. This submersible heater is encased in laboratory-grade glass, which is resistant to shattering. The unit utilizes a TruTemp dial that will recalibrate the heater to provide you with the ability to control the temperature to +/- . 0.5° C.

Eheim Jager TruTemp Submersible Heater


We also like this heater because it features “run dry” protection. With this protection, you never have to worry about the heater working when it is out of the water. Should it be removed from the water (like if you were going to clean the aquarium), it will turn off automatically and remain off until it is put back into the water.

If you are looking for a reliable submersible aquarium heater for large aquariums, then this is a good option.

Our Rating

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