The best aquarium heater

If you’re in a hurry and eager to find out the best aquarium heater. Then we would recommend the Orlushy Submersible Aquarium Heater .

An aquarium heater is a vital component to sustain a healthy aquatic environment; allowing you to have a secure and stable temperature. Therefore choosing the correct one is all the more important, guaranteeing that your fish are always comfortable and happy. This article will look to inform you on the best aquarium heaters in the market and how to select the right one. 

What is the point of an aquarium heater?

The primary purpose of a heater is to control the temperature of the tank. If you fill your aquarium with water that’s room temperature, chances are with external factors such as direct sunlight or AC, it’s not going to remain at that temperature. Certain fish will require specific temperatures to survive. For example, a tropical fish, as I’m sure you can guess, needs far warmer water than a Goldfish, which thrive at temperatures around 65 and 72 degrees Fahrenheit (18 and 22 celsius), which is roughly room temperature. These are just a couple of reasons for needing a heater to sustain a constant temperature in your aquarium. It’s similar to humans, who would want to live in a setting where the temperature regularly changes abruptly. 

Considerations when buying an aquarium heater

There are countless types of aquarium heaters in the market to choose from. The kind of fish you plan on keeping will play a massive role in your final decision. Most aquarium enthusiasts opt for tropical fish since they are visually very striking, but as mentioned, will require you to sustain a warmer temperature in your tank. You can also keep a heater for freshwater fish, some species do require it, if your looking for inspiration when buying freshwater fish, in particular around color, please read our article here. Listed below are some factors you should consider before you make a purchase for a heater.

The size of the aquarium heater and aquarium

The aquarium size will need to be considered before making your final decision. The manufacturers that design the aquarium heaters will often state the correct aquarium size for each model.

The types of aquarium heaters

There are a host of different types of aquarium heaters. The best-known ones are the immersible heater, In-Filter, in-sump, inline, and finally, substrate heaters.

The ease of maintenance

You are going to have to deal with maintenance issues at some point. Therefore it is essential to opt for an easy to clean model, saving you a lot of hassle later on. 

Safety features

Although most brands make sure the heater is entirely submergible. It’s essential to buy a heater that comes with a shut-off feature. This feature automatically shuts off the heater when the temperature gets extremely high or “on” when it gets too low. A personal preference that I look for in a heater that may seem obvious is a light indicator showing when the heater is “on” and heating. 

Where should I place the aquarium heater? 

When it comes to buying the aquarium heaters, this is a question that most buyers overlook. It’s advised to position the heater close to the water flow. You can put it near the inlet or outlet from the filter or even close to the power head’s stream.

The reason is that at this position the water passes directly over it, making it effortless for the heat to diffuse evenly throughout the aquarium.

needyfish’s favorite aquarium heaters 

Below are what we believe to be the best heaters in the market:

1.) Orlushy Submersible Aquarium Heater 

Key Features:

  • Comes in 4 different sizes 
  • Precise temperature dial
  • Explosion Proof
  • Automatic shut off 

This heater can be used in both saltwater and freshwater aquariums. Some users commented that the size is much bigger than expected, so those with a tank that’s 20 gallons or smaller may want to be mindful of this. However, others did not see this as an issue since it can either be placed horizontally or vertically, making it reasonably easy to hide. Overall this heater is durable, affordable, and a great option for anybody who wants to enhance their aquarium environment. 


  • Great value
  • Large dial 
  • Easy to use 


  • Large in size

2.) VIVOSUN Submersible Aquarium Heater 

Key Features: 

  • Temperature control 
  • Comes in two sizes 
  • Anti Flaming heater cover which prevents fish from going too close to the heater
  • Constant temperature function 

Many customers commented on the overall quality of this product. In particular, the titanium metal construction as well as the temperature display. Some people reported problems with the power cord being too short, so they needed to use an extension lead. Several users liked how easy this heater was to program through the accessible button on the cord. This product’s generous price and overall quality represent excellent value for money. 


  • You can install it horizontally or vertically
  • Good price 
  • Easy to read digital display 


  • Short power cord
  • Needs to be completely submerged to work

3.) Hygger Submersible Aquarium Heater 

Key Features: 

  • LED Display Controller
  • Comes in two sizes 
  • Durable and explosion-proof quartz glass heater tube
  • Automatic shut off feature

Several users were impressed with the output of this heater. Some reported that it was able to heat tanks larger than the recommended size, which speaks volumes about this product’s capabilities. A sleek, subtle looking design that is not too big or bright. Some people had issues with the quality of the suction cups. However, this heater would be an ideal addition for large and medium-size tanks. For an added bonus, it also features two blue LED digits, which indicate when the water is heating. 


  • Small in size, entirely submersible, and easy to conceal inside the tank
  • Long cables for indoor usage 
  • Easy to use 


  • Only works best when installed horizontally
  • Very bright LED light

4.) The Fluval E Electronic Heater 

Key Features: 

  • Dual temperature sensors
  • Comes in three sizes 
  • 5-year warranty from the manufacturer

The Fluval heater is perhaps the most technically modern submersible aquarium heater in the market today. The gadget’s LCD (liquid crystal display) temperature display guarantees peace of mind by continually indicating the real-time water temperatures. The LCD changes its color if the pre-set temperature changes. If you are searching for a heater that boasts incredible safety features, then the Fluval E heater is an ideal option. The incorporated fish guard provides advanced protection, meaning the fish will not be able to contact the heater directly.


  • Can warn users when there’s insufficient flow
  • You can precisely set the temperatures in 0.5 increments
  • Easy to read display
  • The digital accessories are easily accessible
  • A safety shut-off feature


  • It’s fairly expensive 


Our choice

Ultimately, your fish’s wellbeing should be paramount when it comes to buying an aquarium heater. For this reason, the Orlushy Submersible Aquarium Heater is our top pick. The controls are easily accessible. It’s reliable and safe, ideal for your fish friends.

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