Eheim’s Jager Aquarium Thermostat Heater is a stylish and innovative way to keep your finny friend’s tank in perfect shape! Simply hang the heating rod in your aquarium and experience precision temperature control wherever you need it. This heater features a jacket crafted from special laboratory glass which ensures even heat emission while doubling as a heat shield. Plus, with 9 sizes to choose from, there’s a perfect Jager Thermostat Heater for any aquatic arrangement—whether you’re an enthusiast just starting out with a 20 liter tank, or a professional maintaining a 1000 liter aquarium.
The calibration adjustment is a bit tricky, but once set properly it keeps the temperature constant and stable in my tank. I was using this same heater to set up my son's tank, but it fell during transit. I tried using it and the indicator light did light up and stayed on, but the water temperature did not reach my set point, so I bought a new one. All is ok now. Heaters do fail especially with age.
Hot Hot Hot
on Jan 3, 2021
This thing will not stop heating my tank. I have a 55 gallon and no matter what temp I turn this too it wants the water to be around 80 degrees... I got a more powerful heater because this room is always cold, and I guess 80 is fine for most fish, but my goldfish prefer a little less than this but this heater just has a mind of its own. I've been dialing down the thermometer temperature every day to see if I can get it closer to 70. So far the lowest it has gone is 77, today I set the dial to 69, I'll keep going down each day to see if it will get the water less hot.
on Dec 19, 2020
Unfortunately, I experienced inconsistent heating like many others. The water would get quite cold before it would turn back on regardless of temperature setting.
Eheim jager heater
on Jan 30, 2021
This heater works well for my turtles. Glad I bought it. 150 watts is great.
Great product at a great price!
on Nov 4, 2020
Can't beat the price or the brand! This unit does everything I expect it to at a price that nobody else could possibly beat.
issues with heating up 150 watt Eheim heater
on May 31, 2020
I'm not sure if this heater is too small for my tank (Waterbox 50.3) or its just not that good.
I have it set to 83 (highest setting) and it only gets to 77.6 tops.
Its not even a month old.
I am going to save it for a backup and buy a 200 watt of another brand.
Heater does work properly!
on Aug 27, 2020
The heater will not keep the temperature consistent!
on Jan 17, 2020
Eheim Jager heaters are the best. I've have used these heaters for years. And never had a problem.
on Aug 24, 2019
I am told these are high quality thermometers. I bought 3. They are not heating ronthe set temperature. I have tried to calibrate the temperature and that is not working out either. The temperature set and the actual reading in the tank are always two different values. I would not buy eheim thermometer again.
Not a reliable heater
on Jul 20, 2019
So I came down this morning to my aquarium very warm. This heater was heating still, even above the already too warm temp. So I unplugged it, turned it down, and now it's not working at all. Very disappointed with this product