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EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1)

4.5 4.5 out of 5 stars 1,122 ratings

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Purchase options and add-ons

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

Customer ratings by feature

Suction power
4.1 4.1
Value for money
3.7 3.7
Accuracy
3.3 3.3

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EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1)
EHEIM Jager Aquarium Thermostat Heater 100W ( Pack of 1)
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Price-27% $25.49
List:$34.99
-16% $30.17
Typical:$35.99
-16% $15.97
List:$18.97
-41% $11.79
List:$19.99
$19.99$29.99
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Suction power
4.1
4.0
4.1
3.9
4.0
4.3
Accuracy
3.3
3.6
3.6
3.4
3.4
4.3
Value for money
3.7
4.3
3.8
4.0
4.5
Temperature Control
3.7
3.6
3.3
3.5
4.3
Sold By
Amazon.com
Amazon.com
HITOP
Amazon.com
Aquarium Station
LUYS

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Item model number ‏ : ‎ 3614090
  • Date First Available ‏ : ‎ June 14, 2010
  • Manufacturer ‏ : ‎ Eheim
  • ASIN ‏ : ‎ B003SNU1I2
  • Country of Origin ‏ : ‎ Germany
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,122 ratings

Product guides and documents

Product Description

All 9 EHEIM Heater models are 100% fully submersible and come with a new TruTemp dial that allows the user to recalibrate the heater within a +/- 0.5F degree accurancy for precise temperature readings.

Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,122 global ratings

Customers say

Customers like the performance and quality of the aquarium heater. For example, they mention it works well and is well made. That said, opinions are mixed on temperature control, calibration, and value.

AI-generated from the text of customer reviews

61 customers mention47 positive14 negative

Customers like the performance of the aquarium heater. They mention that it works well, has provided great service, and has no problems yet. Some say that it's phenomenal and has kept their tank water at an even 78 degrees.

"...EDIT: 2 years later it still works perfectly. My only complaint about these heaters is that they are huge and not easily concealed in the aquarium...." Read more

"This heater is phenomenal and keeps my tank the same temperature always. HOWEVER, there is a small problem...." Read more

"...Works great!" Read more

"It simply doesn’t work most of the time. It turns off and maybe turns on again when the water temperature is 2-3 degrees below the set value...." Read more

57 customers mention41 positive16 negative

Customers like the quality of the pet supplies. They say it's well-made, reliable, and durable. Customers also mention that the temperature controls are nice and stiff. Overall, customers are satisfied with the quality and durability of the product.

"This heater seems very well made compared to other glass heaters...." Read more

"A very classic style of submersible aquarium heater. Heavy duty cord, temperature controls are nice and stiff but the dial indicator is a little..." Read more

"...This unit is either underpowered for what Eheim rates it for or my unit is faulty...." Read more

"...Hopefully it will last a few years since it is a good brand. The temperature dial is easy to see and change...." Read more

96 customers mention66 positive30 negative

Customers are mixed about the temperature control of the pet supplies. Some mention that it does a good job of maintaining the temperature in the tank, while others say that it suddenly started dropping. The temperature adjustment is not properly marked, and the thermostat sticks, causing the heater to stay on regardless of temperature.

"...respected German aquarium product manufacturer and the reviews on this heater were excellent...." Read more

"Good and reliable heater" Read more

"...The user manual does state that it’s not for use with a secondary thermostat but I use mine set to about my max temp and then use an Inkbird set to..." Read more

"...With this heaters length I've been able to maintain temp throughout the tank without issues...." Read more

42 customers mention17 positive25 negative

Customers are mixed about the calibration of the pet supplies. Some mention that it's beyond precise, and the temperature can be calibrated very easily. However, others say that the calibration was a little off at first, and difficult to adjust with the included instructions.

"...Calibration was alittle off at first but easy to adjust with the included instructions." Read more

"...The temperature dial is easy to see and change. It has a calibration dial to set to your tank also." Read more

"...I will say, I have 5 of these and not the first one was calibrated correctly, I couldn't even adjust the red ring/pointer on two of them to match..." Read more

"...few different reasons- and it’s very “old school” with its looks and ability to calibrate. Does the job very well...." Read more

18 customers mention11 positive7 negative

Customers are mixed about the value of the pet supplies. Some mention that the value is good for a heater of this quality, while others say that it's a waste of money.

"...Overall a good solid heater for the price." Read more

"...Good quality, accurate, but limited use. No clue why it is so much longer than it's competitors." Read more

"...It feels well built as soon as you pick it up and the price is right. Even the suction cups work great, no shifting once applied...." Read more

"...Would fit in my biocube 32 chamber but barely! Price was good here on Amazon and I would have kept the heater, but it arrived missing suction cup to..." Read more

Works... But not very accurate dial
3 Stars
Works... But not very accurate dial
I previously had an Aqueon 100W heater which I purchased at the beginning of 2022. After multiple failures and warranty replacements I decided to move on and try this Eheim heater instead.First I will mention that I have a 20 gallon long tank and this thing is huge and does not fit vertically. I have it horizontal in the tank.Next, with the dial set to 78F, it heated my tank to 82F. I turned the blue dial to 74, but it still heated to 80. I followed the calibration instructions. I wanted my tank at 78F and to get there after calibration it needed to be set to 75ish.As long as it maintains the temperature at 78F and does not quit working I guess I will be happy.
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Top reviews from other countries

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Janine J.
5.0 out of 5 stars Good heater
Reviewed in Canada on May 17, 2023
esli abundez
5.0 out of 5 stars Mantiene la temperatura exacta
Reviewed in Mexico on October 15, 2022
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esli abundez
5.0 out of 5 stars Mantiene la temperatura exacta
Reviewed in Mexico on October 15, 2022
Es de origen aleman no chino buena calidad
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One person found this helpful
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Niranjan Ramamurthy
5.0 out of 5 stars Highly recommended!
Reviewed in India on February 5, 2018
6 people found this helpful
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Graham Turnbull
5.0 out of 5 stars Rock solid
Reviewed in the United Kingdom on August 19, 2016
6 people found this helpful
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Laz
5.0 out of 5 stars Working good
Reviewed in Canada on October 3, 2022
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Laz
5.0 out of 5 stars Working good
Reviewed in Canada on October 3, 2022
So far it’s working great I have waited for at least a month of continuous use before making a review and so far it’s good. It makes sense because it’s made from Germany. Should be a good quality. Also you should have at least a foot deep of water to use this because it has to be standing.
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2 people found this helpful
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