Eheim Thermocontrol E Fish Aquarium Heater, 75 W

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$44.99 Chewy Price
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Pay in 4 interest-free payments of $11.25. .

About This Item

Details

  • Comes with a convenient 5.5-foot-long plug-in cable, a double suction cup holder to securely place the heater anywhere in the tank and an easily visible control lamp that shows red for "heating up" and green for "temperature reached".
  • The heater is durable and impact resistant.
  • Suitable for both freshwater and saltwater aquariums!
  • Offers precise temperature adjustments.
  • Designed with a glass jacket that increases the heating surface area for optimal emission.

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Questions & Answers

4 Customer Questions

How long does it take to warm up from tap water temperature?

Answer by Annieo • Nov 19, 2025
I'm no expert, but in my experience, warm-up time will depend on the temperature of your tap water, the size of the tank, and the wattage of the heater, and maybe air temperature as well. Where I live, my tap water in January is way colder than it is in July, and my room temperature is less also, so my expectations have to be adaptable.

What are the tank sizes for each wattage option?

Answer by Chewy • Mar 07, 2023
The 75 watt is recommended for 5.5 – 13 Imp (6.6 – 15.8 US gallons), the 100 watt is recommended for 22 – 33 Imp (26.4 – 39.6 US gallons), the 150 watt is recommended for 44 – 66 Imp (53 – 79 US gallons), the 200 watt is recommended for 66 – 88 Imp (79 – 106 US gallons), the 250 watt is recommended for 88 – 132 Imp (106 – 159 US gallons) and the 300 watt is recommended for 132 – 220 Imp (159 – 264​​​​​​​ US gallons).

What is the length of the heater?

Answer by Chewy • Dec 07, 2022
The 75 W heater is approximately 10.23 inches long, the 100 W is approximately 12.16 inches long, the 150 W is approximately 13.18 inches long, the 200 W is approximately 15.59 inches long, the 250 W is approximately 17.4 inches long and the 300 W is approximately 19.52 inches long.

What is the lowest you can set it to?

Answer by Chewy • Mar 13, 2023
This heater has a temperature range of 20-32 degrees Celsius (68-90 degrees Fahrenheit).
Reviews
Write a Review
4.3
Rated 4.3 out of 5 stars
35 Ratings
Terms & Conditions

17 Customer Reviews

Rated 3 out of 5 stars
By jeff on Dec 8, 2025

Slips off brackets

The design of the heater looks amazing but kept slipping off the secure suction cup holders. I don’t want a floating heater bobbing around.

The design of the heater looks amazing but kept slipping off the secure suction cup holders. I don’t want a floating heater bobbing around.

Rated 5 out of 5 stars
By Leslie on Oct 30, 2025
Top 500 Contributor

Works as expected

Came fine. Works as expected. Keeps the water a constant temperature. Know where you want to put it because the suction cups are a pain to pull off if you change

Came fine. Works as expected. Keeps the water a constant temperature. Know where you want to put it because the suction cups are a pain to pull off if you change your mind. But they do stick fast!

Rated 5 out of 5 stars
By Chad on Aug 22, 2025

Ehiem has great aquarium heaters

I really needed two 75 watt heaters and had a lot of new features. Ehiem is outstanding heater! Arrived when promised from Chewy and there communication is A+.

I really needed two 75 watt heaters and had a lot of new features. Ehiem is outstanding heater! Arrived when promised from Chewy and there communication is A+.

Rated 5 out of 5 stars
By NORMAN on Jun 3, 2025

Eheim Thermocontrol heater

I love Eheim products, particular heater has absolutely precise accuracy - I love it

I love Eheim products, particular heater has absolutely precise accuracy - I love it

Rated 4 out of 5 stars
By Steve on Nov 30, 2024

Solid But Needs Calibration

I have others of these heaters that have been rock solid for decades so I expect this to be the same. It does a good job of holding the temperature. The temperature

I have others of these heaters that have been rock solid for decades so I expect this to be the same. It does a good job of holding the temperature. The temperature markings on the dial are off by three degrees so it took me a couple of days to calibrate the setting with a thermometer.

Rated 1 out of 5 stars
By Joseph on Jan 1, 2025

Eheim QC is lacking

Heater was tested twice in 30 gallons of water set at 82 degrees by the dial. Had a power head circulating water around it. Only achieved a 76 degree reading in

Heater was tested twice in 30 gallons of water set at 82 degrees by the dial. Had a power head circulating water around it. Only achieved a 76 degree reading in 48 hours.

Rated 5 out of 5 stars
By Eric on Aug 27, 2025

Heater

Great product

Great product

Rated 5 out of 5 stars
By Randy on Dec 8, 2024

It works

I got it for emergency

I got it for emergency

Rated 1 out of 5 stars
By Matt on Nov 13, 2023

fading quality

Have always had excellent experiences with Eheim products in the past. The last 3 aquarium heaters that I purchased, only lasted on average 2-3 months. Either the

Have always had excellent experiences with Eheim products in the past. The last 3 aquarium heaters that I purchased, only lasted on average 2-3 months. Either the pilot,(on-off) light doesn’t ever come on, when heating, or when the pilot light, stays on, but the heater, never heats up. But, I still keep buying them. When you get a good one, it will last forever!

Rated 1 out of 5 stars
By Roy on Sep 21, 2023

Inferior Product

I struggled for months with the temp. It was up and down all the time. Decided to discard this heater. Purchased a Marineland for half the price and it works pe

I struggled for months with the temp. It was up and down all the time. Decided to discard this heater. Purchased a Marineland for half the price and it works perfectly.