Eheim Jager Thermostat Aquarium Heater, 200-watt

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$38.95 Chewy Price
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About This Item

Details

  • Helps you maintain an ideal temperature with detailed adjustments—from 18-34 degrees Celsius.
  • Fitted in a "jacket" made of special laboratory glass to increase the heating surface inside your tank.
  • Completely submersible, with a double suction cup holder for easy set-up.
  • Keeps a constant temperature, always holding your chosen level of heat.
  • Suitable for both saltwater and freshwater environments.

Instructions

Questions & Answers

16 Customer Questions

can i lay this heater flat down in the water

Answer by Chewy • Feb 26, 2019
You may lay this heater flat as it's completely submersible, with a double suction cup holder for easy set-up.

How tall or long is this heater?

Answer by Chewy • Feb 27, 2019
The approximate aquarium heater height for the 50 watt is 243 millimeters, the 100 watt is 319 millimeters, the 125 watt is 319 millimeters, the 200 watt is 406 millimeters, the 250 watt is 452 millimeters, the 300 watt is 506 millimeters.

Does this come with a guard so the animal doesn’t get burnt? Looking to use for my turtle.

Answer by Chewy • Feb 15, 2021
Eheim Jager Thermostat Aquarium Heater is built with an ultra-modern, unique design that encases the heating surface in laboratory glass—which helps it keep your aquarium's heat levels steady.

Does this heater have a power cord?

Answer by Chewy • Feb 09, 2021
This Heater runs on electricity and must be plugged in to work properly.
Reviews
Write a Review
4.3
Rated 4.3 out of 5 stars
173 Ratings
Terms & Conditions

106 Customer Reviews

Rated 1 out of 5 stars
By Joni on Oct 31, 2025

What happened to the reliable Eheim aquarium heaters?

I have an Eheim Jager that is six+ years old and still working perfectly. I've been struggling to stabilize the two I bought in June 2025. One finally stabilized

I have an Eheim Jager that is six+ years old and still working perfectly. I've been struggling to stabilize the two I bought in June 2025. One finally stabilized around 77 degrees. The other is erratic, and I had to take numerous thermometer checks a week because it would go from 64 to 80 within a couple of days. When it was high, I'd turn the blue dial down, and SOMETIMES it would go down. Today, the temp was high around 79. The blue is already set in the 60s! This is ridiculous. I finally pulled it out today and put another brand in the tank. Something has happened with Eheim production. Eheim used to be the #1 aquarium heater in the world.

Rated 5 out of 5 stars
By Emily on Nov 22, 2025

Pricey but worth it!

I've bought two cheap heaters before this one and they never worked at all, but I struck gold with this one! It's controls are a bit confusing but it kept my Betta's

I've bought two cheap heaters before this one and they never worked at all, but I struck gold with this one! It's controls are a bit confusing but it kept my Betta's water nice and warm.

Rated 4 out of 5 stars
By Erik on Oct 31, 2025

Good heaters, for the price

Have about 6 of these, good little heater, although each one had to be calibrated and was not set to the correct temperature.

Have about 6 of these, good little heater, although each one had to be calibrated and was not set to the correct temperature.

Rated 5 out of 5 stars
By Amber on Jul 21, 2025

Finally, a Reliable Heater That Actually Works!

I'm extremely satisfied with this heater. I’ve bought three other brands, both online and from local stores, and none of them worked properly. But this one is excellent

I'm extremely satisfied with this heater. I’ve bought three other brands, both online and from local stores, and none of them worked properly. But this one is excellent -it's incredibly responsive. As soon as the water temperature drops just 1F, it detects the change and starts heating immediately. Now my little turtle is happily swimming in water that stays at a consistent 81F.

Rated 5 out of 5 stars
By Diana on Jun 1, 2025

So far so good

I have always used Eheim heaters. This one was for a 5.5 gallon tank and was too long to be straight up and down so it is on a slant. The temperature did have to

I have always used Eheim heaters. This one was for a 5.5 gallon tank and was too long to be straight up and down so it is on a slant. The temperature did have to be calibrated, as it was running 5 degrees hotter than what it was set at, so be aware if you are putting it in an established tank with fish.

Rated 5 out of 5 stars
By Christopher on Apr 26, 2025

Happy Camper

Works great and very accurate, with calibration ability. What can you say, accept the company that stands behind their product. Warranting my unit that burnt out

Works great and very accurate, with calibration ability. What can you say, accept the company that stands behind their product. Warranting my unit that burnt out. Of no one's fault by my own...

Rated 5 out of 5 stars
By Deborah on Sep 12, 2025

Works great

Just what we needed, at the right price.

Just what we needed, at the right price.

Rated 5 out of 5 stars
By Eric on Aug 30, 2025

Heater

Great quality products very fast shipping

Great quality products very fast shipping

Rated 2 out of 5 stars
By William on Mar 31, 2025

Faulty thermostat

No matter what I set the temp too it 40 gallon tank was 81-85 degrees 3s. Calibrating thermostat was a bad system, or maybe it was just that mine wasn't assembled

No matter what I set the temp too it 40 gallon tank was 81-85 degrees 3s. Calibrating thermostat was a bad system, or maybe it was just that mine wasn't assembled correctly.

Rated 1 out of 5 stars
By William on Dec 2, 2024

Quality has gone downhill

Ordered two, one of them wouldn't calibrate, the replacement showed up broken, last replacement seems to be ok. Not really Chewys fault. EboJager made great heaters

Ordered two, one of them wouldn't calibrate, the replacement showed up broken, last replacement seems to be ok. Not really Chewys fault. EboJager made great heaters. I've been keep fish for 0ver 50 years, and they have been rock solid. When Eheim bought them, who I love, they removed the ceramic core which makes them more prone to failure. Worse part is they are so light, they float. Once the suctions cups fail, they will float to the top.