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Fluval Submersible LCD Aquarium Heater

$ 49.00 until FREE shipping

Advanced Electronic Aquarium Heater

The LCD temperature display provides peace of mind as the actual aquarium water temperature is continuously displayed in either Celsius or Fahrenheit. During normal operation the temperature read out will change color if the aquarium water varies +/-1°C or +/-2°F or more from the preset temperature. Make sure to mount the heater at a 45 degree angle to get best heat distribution. We recommend 5 watts of heater per gallon of water. When in heating more than 10 degrees from room temperature, consider up sizing. Also we highly recommend using a glass top to keep your heat in. 

  • LCD displays actual water temperature 
  • High/Low temperature alert 
    • Should any external heat sources or other equipment, such as chillers, cause the aquarium water temperature to rise or fall beyond 3°C or 5.5°F, the colored screen will flash, indicating a potential risk.
  • Precise and easy temperature adjustment
    • With the easy to use adjustment lever the temperature can be precisely set in 0.5°  increments
  • Advanced fish protection
    • The integrated fish guard offers advanced protection. Fish and invertebrates cannot come in direct contact with the heater core. The heater is protected against shocks from large fish species.
Model Aquarium Size
E100 up to 30 gallons 
E200 up to 65 gallons
E300  up to 100 gallons


Customer Reviews

Based on 111 reviews

So far this heater is great and I've had zero problems. I love the easy to read display easy to adjust and it has kept my tank at a steady temperature.

Great, but one issue you should be aware of when you first get it.

When my old heater couldn't keep my tank warm enough as winter set in, I bought this heater due to its capabilities and reviews. I have only used it for a few days, but I love it so far. It's easy to adjust the settings. It's easy to understand and set. However, I have a big problem with the instruction sheet printed in many different languages. Ever tried to read 6 point super small type in a room at night darkened with an older person's eyesight? Forget it. Also, just trying to figure out the instructions in the semi-dark of a room was awful. Who can read such fine print? Luckily, I could see a few of the small pictures and figure things out until I could get in a room later. It would have been nice to know you should let it sit in the tank for 20 minutes before turning it on! Of course, that's in the very small print that I would have read if I could read it! I'd give it 4.5 stars. This shouldn't stop you from buying it. But if you are changing a tank that has a bad heater or in a hurry, get out the magnifying glass!

Great Heater

I have purchased two of these heater and I love both of them, they are accurate and dependable.

Amazing product

I love this product bc of the cage around the heater. It helps protect it from certain fish and makes it great to use with my turtles and in indoor ponds

Good heater, GREAT service

I purchased two of these heaters and had an issue with one. Aquarium Co-op immediately took care of the issue and well above and beyond any expectation I had. I will be a customer for as long as they are around. Thanks guys!!
The heaters have been working great and the warranty is unmatched.