Eheim Jager Thermostat Aquarium Heater

By Eheim
Rated 4 out of 5 stars
Slide 1 of 3
Eheim Jager Thermostat Aquarium Heater, 250-watt slide 1 of 3
Slide 1 of 3
Eheim Jager Thermostat Aquarium Heater, 250-watt slide 1 of 3

$35.97Chewy Price
$38.15Chewy Price

In Stock
FREE 1-3 day shipping over $49

Frequently Bought Together

This Item - Eheim Jager Thermostat Aquarium Heater, 250-watt
Rated 4 out of 5 stars
$35.97Chewy Price
Aqueon Freshwater & Saltwater Circulation Aquarium Pump, 1250 GPH
Rated 3.6579 out of 5 stars
$20.87Chewy Price
AquaClear CycleGuard Power Filter, Size 70
Rated 4.3739 out of 5 stars
$56.99Chewy Price
Total Price: $0.00

About This Item

  • 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.

Compare Similar Items

Customer Rating
Rated 4 out of 5 stars
Rated 3.8889 out of 5 stars
Rated 3.1538 out of 5 stars
Rated 2.3846 out of 5 stars
$35.97Chewy Price
$27.01Chewy Price
$25.99Chewy Price
$19.97Chewy Price
$52.99Chewy Price
Fish TypeTropical FreshwaterTropical Freshwater, Betta, Cichlid, Goldfish, Marine FishTropical Freshwater, Marine FishTropical Freshwater, Betta, Cichlid, Goldfish, Marine FishTropical Freshwater, Marine Invertebrate
Aquarium TypeFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, Saltwater

Questions & Answers

21 Customer Questions

can i lay this heater flat down in the water
Answer by ChewyFeb 26, 2019
You may lay this heater flat as it's completely submersible, with a double suction cup holder for easy set-up.

what size heater do I need for a 30 gallon tank?
Answer by ChewyFeb 01, 2022
The 100-watt heater is for 100-150 liters (26-39 gallons)

Does this heater have a power cord?
Answer by ChewyFeb 09, 2021
This Heater runs on electricity and must be plugged in to work properly.

How tall or long is this heater?
Answer by ChewyFeb 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.

ReviewsWrite a Review

Rated 4 out of 5 stars
57 Reviews
Would recommend to a friend

57 Customer Reviews

Rated 1 out of 5 stars
By TimR on Feb 27, 2022

Heater not working properly

These are great units however I recently received mine from chewy and the unit is not working properly the temperature in the tank is experiencing large fluctuations which has caused Ick in my tank!!!! Very unhappy not chewy fault

Rated 3 out of 5 stars
By Snay on Feb 10, 2022

I got the wrong size

It was obviously my fault for not reading the description closer but I ordered the largest size heater instead of a more medium size for my 29 gallon. It’s working fine and I’m not aware of any danger of using a too-big heater, so I’m happy enough with it.

Rated 5 out of 5 stars
By Luna on Dec 2, 2021

Works great for me !

The reviews scared me, and I’ve only had this for two days, but so far this has worked perfectly for me. It definitely works and heats up my water, and it automatically turns off when it senses that it isn’t in water. I honestly love that. It’s super easy to use and to attach to any aquarium. The suction cups stay amazing and are perfectly attached to the heater itself. It was bigger than I thought it was going to be however. But I’m so happy I got it. For the price and the fact that it was on sale, I love it.

Rated 5 out of 5 stars
By Tony on Jan 15, 2022

Well worth the money for a great heater

Nothing more to say other then works great holds a fairly good temp only down side is don't hold true to the temp on the dial but they never do unless you buy a 300 dollar one play with it some but with that being said have mine set to 75 n it runs around 79 to 80

Rated 5 out of 5 stars
By Unos on Jan 6, 2022

Half the price

Me and my SO both bought 300w aquarium heater. Mine was here and delivered within 2 days and was a super great deal made in Germany and he paid over 2xs as much and it was made in china. Not that that's bad just usually a quality difference. I am so happy with

Rated 5 out of 5 stars
By Ashley on Dec 1, 2021

Awesome product!

I got this for my 20 gallon community tank to keep my male betta warm through the winter months. I've had it in for a couple months now and so far so good! Keeps my tank at 78-80 perfectly and no issues so far. I plan on getting another for my 55 gallon eventually as I'm not as impressed with the current heater I have in it. Just make sure to look at the details as this IS a longer heater and I was already aware it would have to be sideways in my tank, which I'm okay with.

Rated 5 out of 5 stars
By DavidR on Dec 6, 2021

Quality Heaters

You cannot go wrong with these quality made heaters. The German Eheim Jager brand will stand up for the long haul and they're precision made all the way. They're also priced to compete with other lesser quality brands, I've gone thru several. Really happy with this heaters, I purchased two 300 watt for my 200 gallon outdoor tank, to withstand the cooler weather coming this winter. Thanks again Chewy!

Rated 5 out of 5 stars
By aquariumhobbyist on Jan 13, 2022

best heater

The only heater I use. Last about 4 years which is good. They used to last much longer. But 4 years isn't bad in comparison to other heaters longevity. I've tried others but always a mistake.

Rated 5 out of 5 stars
By TomTurkey on Nov 16, 2021

Just the ticket

My last Jager Thermostat lasted me "forever" and then all of a sudden it conked out after many years of heating my aquarium and keeping my fish warm. So, what did I do? I ordered another Jager Thermostat Heater and I have had it in my tank for about 2 weeks now and it is doing great. The temp. is where it should be and my fish are very happy. I hope that I have this one for many years to come. Yes, I would recommend this heater for your aquarium.

Rated 1 out of 5 stars
By Mott on Jan 23, 2022

Not worth the money

This product went out on me just after 6 months, I do not recommend this heater.