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Best Aquarium Heaters: Our Top Picks 2023

To keep your fish happy and healthy, maintaining a steady temperature in your aquarium is vital. To maintain a steady temperature, you’ll most likely need an aquarium heater, and that’s exactly what I’m here to help you find right now. Let’s get to it and take a look at the top five best aquarium heaters that your money can buy.

Best Aquarium Heaters

Top 5 Best Aquarium Heaters: Reviews

Let’s look at the top five best aquarium heaters that will help maintain a steady temperature in your fish tank.

1. YukiHalu Small Submersible Aquarium Heater: Our Number One Pick!

YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W...
  • 【Super Mini Size, 25Watt for 1-5 Gallons】 YukiHalu 25W aquarium heater is designed for 1-5...
  • 【Automatic Constant Temperature with 1℉Accuracy】Thanks to advanced Intelligent Frequency...

Here we have a small submersible aquarium heater, with this 25-Watt model being ideal for aquariums up to five gallons in size and for virtually any type of fish. There are also other options available, including 50, 100, 200, and 300 watts.

Using the LED display and the setting button, you can easily adjust the temperature to anywhere between 64 and 93 degrees Fahrenheit, with a 1-degree accuracy. The fact that it is an external control means that you never have to put your hand in the tank to make any adjustments.

It comes complete with its own thermostat to ensure that it maintains a constant temperature. It even has a memory function so it will remember the last setting you choose before you shut the unit off.

This unit features overheating protection and out of water protection to make sure that it won’t keep heating if it is out of water. The included suction cup makes it very easy to mount this small aquarium heater anywhere on the inside of your aquarium.


  • Easy to mount
  • Several wattage options
  • Accurate temperature maintenance
  • Easy to adjust
  • Safe for fish
  • Affordable


  • Somewhat limited impact resistance

For the low price that this aquarium heater comes in at, combined with its fantastic functionality, we think it’s the best option worth considering.

2. HiTauing Aquarium Heater

HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater...
  • 🐠【Rapid Heating and Two Temperature Control System】300W aquarium heater is sutable for 40-75...
  • 🐠【Intelligent Water Sensor and Over Temperature Protection】This fish tank heater has a unique...

This aquarium heater comes in power options that are ideal for aquariums of all sizes. These range from 50 watts all the way up to 500 watts, with the 300 watt model, for instance, being ideal for aquariums up to 75 gallons.

The Hitauing is made with a nickel-chromium heating wire, which is very stable, effective, and long-lasting. It should be able to quickly heat up your aquarium to the desired temperature within a very limited amount of time.

It comes complete with an intelligent water sensor and over-temperature protection to ensure that it maintains a constant temperature without harming your fish. It also has a sensor to ensure that the heater turns off when it is completely out of water.

With the included controller, you can adjust the temperature to anywhere between 63 and 94 degrees Fahrenheit, which should be more than good enough for any fish tank.

The fact that it is made out of quartz glass and that is said to be explosion proof is another big benefit. It also features a very strong shell made with temperature resistant ABS plastic to ensure the safety of your aquarium inhabitants.


  • Quite durable
  • Several safety features
  • Easy to adjust and mount
  • Fair price
  • Various sizes


  • Can be difficult to clean

If you need an aquarium heater that is suitable for tanks of all sizes, this is a model I recommend taking a closer look at.

3. HITOP Adjustable Aquarium Heater

HITOP 25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank...
  • 🐟HITOP aquarium heater 50W, length 7.2-inch, power cord 4.9ft, designed for small fish tanks,...
  • 🐟 Thickened Glass: 2mm thickened quartz glass, 33% thicker than 1.5mm normal aquarium heaters,...

Here we have what is perhaps the simplest and most affordable aquarium heater on the list today. Unlike the other models, it comes with a simple temperature control dial, as opposed to a separate controller. It’s still very easy to control, although you will have to put your hand inside of the tank.

That said, the heater still allows you to adjust the water anywhere between 68 and 93 degrees, which should be more than good enough for most purposes. 

Thanks to the integrated thermostat, it should be able to keep the aquarium water at a reliable temperature, within two degrees Fahrenheit of your set temperature.

To ensure that this unit is safe for humans and fish alike, it features 2 millimeters of thickened quartz glass, which is both temperature and impact resistant. 

To make mounting easy, it comes with simple suction cups so you can easily attach it to the inside of your aquarium.


  • Fantastic price
  • Available in various power options
  • Very easy to mount
  • Simple operation
  • Fast and accurate temperature adjustment
  • Durable design


  • Does not have a separate controller

If you need something simple and affordable, this is probably the best option on the list today.

4. Uniclife Aquarium Heater

Uniclife Aquarium Heater 25W/50W/100W/200W Adjustable Submersible Heating Rod...
  • For 5-20 Gal Tanks: Measure 8.5 inches in length. Applicable for aquaculture and fresh, marine and...
  • Adjustable: Controllable temperature range from 68 °F to 93 °F (20-34 °C). Simply rotate the knob...

The Uniclife Heater is another very simple and affordable yet effective aquarium heater. It comes in several wattage options ranging from 25 up to 200 watts, therefore making it ideal for both small and large tanks alike. For instance, the 50-Watt model is ideal for tanks up to 20 gallons, and measures 8.5 inches in length.

This aquarium heater comes complete with an integrated thermostat to ensure constant temperature maintenance, and it comes with a control dial so you can set it at a temperature ranging between 68 and 93 degrees Fahrenheit.

Keep in mind however that the standard deviation here is anywhere between 2 degrees and 4 degrees Fahrenheit, which may be a little high for some people.

This aquarium heater comes with a special indicator system to let you know when it is heating and when it is not. It also features overheat protection to ensure that it stops heating if it is no longer in the water. It’s also made with a heat resistant and shatterproof design to ensure that it does not break inside of the tank and potentially harm your fish.

The fact that this is a very simple unit that you can just attach to the inside of your aquarium with a couple of suction cups makes life a bit easier as well.


  • Affordable price
  • Easy mounting
  • Easy to adjust
  • Very fast heating
  • Impact resistant
  • Very safe for fish


  • Not the most accurate heater

If you want a reliable aquarium heater that takes just a minute or two to set up, this is one worth looking into.

5. Hygger Aquarium Heater

hygger Aquarium Heater 300W/500W/800W/1000W, Submersible Fish Tank Heater with...
  • 🐠300 WATTS AQUARIUM HEATER - 300W aquarium heater is suitable for 40 to 80 gallon saltwater and...
  • 🐠OVERHEATING & OUT OF WATER PROTECTION - When the water temperature exceeds 94°F or it is lower...

Here we have what is likely the highest quality aquarium heater on the list, although also the most expensive. One of the defining features here is the power level, as this one starts at 300 watts and ranges all the way up to 1000 watts.

This aquarium heater is therefore designed for larger tanks, with even the smaller 300-Watt model being ideal for tanks up to 80 gallons in size.

This heater comes complete with out of water protection and overheating protection to ensure the safety of your fish and to make sure that the heater itself doesn’t burn out.

It also comes with a digital LED controller that allows you to adjust the temperature to anywhere between 59 and 93 degrees Fahrenheit, which is a great temperature range, along with an accuracy of +/-1 degree.

What really stands out is that this aquarium heater is made out of extremely high-quality materials, including PC plastic and explosion proof quartz glass, combined with a high temperature resistant nickel chromium heating wire.


  • Ideal for big tanks
  • Various wattage options to choose from
  • Very durable and high-quality overall
  • Fantastic temperature range
  • Easy to mount, control, and maintain


  • Not exactly budget friendly

If you need the biggest and most powerful aquarium heater around, this is the one for you!

Aquarium Heaters Buyers Guide: What to Look For  

Let’s quickly talk about some of the most important things that you need to look out for when purchasing an aquarium heater.


You always want to look out for a durable aquarium heater that features a solid quartz glass design, along with other high-quality materials. You don’t want these heaters breaking due to a simple impact and exposing the interior elements to the water.

Safety Features

Getting the wrong aquarium heater can spell disaster for your fish, because very poor-quality models may heat the water up too much or even electrocute your fish. Therefore, you need to get a model that has overheat protection and is also designed to be explosion proof and shatter proof. You don’t want any of the electrical components making contact with the water.

Accurate Temperature Setting

Aquarium thermometer temperature in tropical fish aquarium

You should always look for an aquarium heater that allows you to set the temperature anywhere between 63- and 94-degrees Fahrenheit, and the wider that temperature range is, the more versatile the unit is. You also want to ensure that the aquarium feature in question has a built-in thermostat for accurate temperature maintenance.

Power Level

Always pay attention to how many watts the heater in question has, as this will determine what size of tank it is suitable for. For instance, a 25-Watt heater is suitable for tanks up to 5 gallons.