AQQA Submersible Aquarium Heater Review – A Reliable Product

We’ve all been there. You go to the pet store, have some amazing fish, hoping for a fantastic aquarium journey, but instead, you find yourself stocking up on medications and testing kits. Then, a few weeks later, your sickly little fish are gone, replaced by a tank full of cloudy water and regret.

I have some great news for those who want to avoid this heartbreak! AQQA has developed an entirely new type of heater that will take care of your fish as well as your plants.

Do you want to keep it at the right temperature for your fish and plants but don’t want to pay an arm and a leg for electricity? Then, the AQQA Submersible Aquarium Heater is the solution!

AQQA Submersible Aquarium Heater Review

AQQA Submersible Aquarium Heater is an automatic digital aquarium heater, which can be used for both fresh and saltwater tanks. It has a built-in thermostat that automatically maintains the desired water temperature within 1 degree F of your set point. The LED display will show the current temperature and the setpoint temperature. 

AQQA Submersible Aquarium Heater Specification

This product features a compact design with a low profile, so it can fit in most aquariums without obstructing views or fish swimming patterns. 

The product has some incredible features that are described below.

Safe & Reliable

Safe & Reliable AQQA Submersible Aquarium Heater

This submersible aquarium heater is a great way to keep your fish healthy during the winter months. This product, made of heat-resistant quartz glass and PC plastic cover, has been designed for ultimate safety. 

Double seal material provides explosion-proof protection for humans, fish, or other fish tank inhabitants. 

Quartz glass has good thermal conductivity. It also features nickel-chromium wire inside, making it fast heating and extremely durable!

Intelligent Automatic Heating

Intelligent Automatic Heating AQQA Submersible Aquarium Heater

The AQQA aquarium heater has a sleek design with an automatic constant temperature function! The external controller lets you choose between 59ºF or 93ºF. Simply hold down the Hold button until your desired setting shows up on the screen, then switch easily from Celsius to Fahrenheit by pressing this same button at the top right corner – it will restart heating when water reaches 1 ℉ (1° C) below set point.

If the power goes out during operation, there’s no need to worry because its memory retention saves all previous settings, which means good things happen next time around.

Digital LED Display

Digital LED Display Of AQQA Submersible Aquarium Heater

The AQQA aquarium heater has an LED display on the middle of its controller front side, which shows you at any given time what temperature it’s set to. When working correctly with no errors in temperature control, this red light will stay constant and steady. The blue lights with the E1 fault display indicate when something goes wrong- they remain lit until that problem has been solved!

Vertical & Horizontal Placements

Placement Of AQQA Submersible Aquarium Heater

The AQQA Aquarium Heater is a great choice for those who want their fish tank to be at the perfect temperature. This heater uses an attached adjustable hanging rack and 2 suction cups, so you can place it in any orientation, vertical or horizontal, without needing help from another individual! 

Note: Make sure you install this heater fully submerged near a flowing area of water to ensure even heat distribution.


Saltwater and Freshwater AQQA Aquarium Heater

The perfect solution for a chilly day, the AQQA aquarium heater is designed to keep your fish happy and healthy. In addition, it can be used in both freshwater and saltwater setups!

Warranty & Customer Care

Warranty Of AQQA Aquarium Heater

The AQQA Aquarium Heater comes with 12 months of manufacturer’s warranty as well 24 hours professional after-sales service, so you’re covered no matter what happens during the installation and operation.


  • 5 different sizes are available.
  • The heating element is reliable to ensure faster temperature rise.
  • The heater guard protects fish from scalding.
  • Adjustable hook to mount the controller unit, which is very convenient. 
  • The product has a 1-year warranty and a responsive customer care service.
  • The built-in memory saves the previous setting in case of a power outage.


  • The heater is a bit bulky in look.
  • Installation could be a little tricky for new users.
  • Some users faced that the heater melted after a few months.

Safety Instructions

Position Correctly: Make sure that the heater is completely sunk into a body of water with no gaps; it should be horizontal or vertical and fixed in somewhere where there’s a better flow. And let the display lights be visible light as clearly possible!

Keep Water Circulation: Keep water in circulation in the tank when using the aquarium heater. The recirculating function will keep the tank evenly heated and prevent any localized overheating from happening!

Cooldown Before Maintenance: Take care when removing the heater from your aquarium so that you don’t scorch yourself with a hot surface and the heater coil is not burned out. Be sure the aquarium heater is turned off and allow at least 30 minutes for cooling before removing it from the water.

Do Not Put It In The Sand: Make sure to place your heater in a location that will not be covered with sand. This is because the particles of sand may cause it to stop working efficiently, leading to overheating, which could damage the heater! 


Can the protective cover be removed to clean the heater?

The AQQA aquarium heater has a protective cover that can be removed for cleaning. However, please wait until the heating rod cools down completely before handling it to avoid getting burned by its hot surface!

Can this heater be used in an Acryllic tank?

IF IT IS PROPERLY SIZED, the AQQA aquarium heater can be used in any acrylic tank, but there must always be water circulation.

How do I change the temperature readout from Celsius to Fahrenheit?

The Celsius to Fahrenheit conversion is easy with this aquarium heater! In 500W and 800W models, you can press “+” and “-” buttons at the same time then hold it down for 5 seconds- in that time, you’ll have converted between Celsius and Fahrenheit.

For 100W, 200W, or 300W, press and hold the top button for 5 seconds to change your temperature display from Celsius to Fahrenheit and vice versa.

AQQA Submersible Aquarium Heater - Celsius to Fahrenheit

Final Words!

It’s no secret that the AQQA Submersible Aquarium Heater is a great investment for any aquarium. While it does have its drawbacks, like anything else, we recommend giving this heater a try and seeing if you can make it work for your needs. 

We think this product will be worth your while with its plethora of features and affordable price point! 

If you want to know more about why we love the AQQA Submersible Aquarium Heater or how exactly it works (or doesn’t), please do leave us a comment below. 

We would love to hear from those who are considering purchasing one!

2 thoughts on “AQQA Submersible Aquarium Heater Review – A Reliable Product”

  1. We have the 500 watt heater. It seems to be Is Celsius and we needed to read To Fahrenheit. We do not have on off buttons our temperature is side-by-side I need to know how to put it back to Fahrenheit

    • Hi Susan,
      Conversion between Fahrenheit and Celsius is easy. You may change the unit from Fahrenheit to Celsius by holding down the SET button on the top of the controller for five seconds. Then it will change the unit. Thanks.


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