Best Heater For Betta Fish – Top 10 Picks

Best Heater For Betta Fish

You need a tank heater for your betta fish, and it’s one of the most essential pieces of equipment you can get.

The temperature in their natural environments doesn’t change drastically – they’re adapted to tropical waters, which are typically quite a bit warmer than room temperature at your home! 

Next to selecting your aquarium, choosing an appropriate heater is the most crucial part of setting up a betta tank. 

Some aquarium kits come with one included, but many of you will need to purchase a separate heater. But how will you select the best heater for Betta fish?

In this article, I will be sharing with you the 10 best betta heaters offered today!

What Temperature Should Betta Fish Tank Be?

What Temperature Should Betta Fish Tank Be

The best temperature for a betta fish is somewhere between 74 and 82 degrees Fahrenheit. While they can tolerate cooler or warmer temperatures for shorter periods, prolonged exposure will stress them out! Therefore, temperature levels outside this array will also potentially reduce their lifespan.

The other point to remember is that the temperature of your water needs to be maintained relatively constant. Repetitively altering the temperature between 74 and 82 degrees can stress your Betta equally.

How To Choose The Very Best Heater For Your Betta Fish

There are a plethora of top-quality Betta tank heaters out there. Some have better controls, others possess more features, but all will get the job done for you! 

In my review, I won’t only be showing you some of these great units; instead, it’ll include detailed information on what to look for when purchasing one so that your experience with them is nothing short of perfect. 

When acquiring a heating system for your betta fish tank, it is just fair that we discuss the aspects and indicators to look out for. So, before I go to our chosen 10 best heaters for betta fish, allow me to discuss some of the crucial things to look out for when obtaining a heater.

From Watts To Tank Dimension

One crucial factor might be the watts-per gallon ratio, as this will let us know how much power each unit can output.

How To Choose The Best Heater For Betta Fish 1

A heating system would preferably put out 3 to 5 watts per gallon of water. For that reason, if you possess a 5-gallon tank, you would undoubtedly require a heater that gives between 15 & 25 watts of power. It’s feasible to utilize two heaters if one can not get the job done effectively.


The fish tank heater can help you maintain the correct water temperature for your pet. The most important thing to consider when choosing one is that it is easy to read the current temperature and the capability to warm it. Therefore, it is always crucial to choose heaters that are understandable temperature-wise.

How To Choose The Best Heater For Betta Fish 2

But the temperature reading on your heater might not be precise all the time. That is why it is better to have an extra thermometer.

Security Functions

Heaters are primarily positioned in the fish tank and run by an electrical power source. But, you know – electricity is a dangerous power if not appropriately handled. Yet, these companies that manufacture these heaters know this.

How To Choose The Best Heater For Betta Fish 3

That is why most of the heaters are made to be risk-free both for the betta owners. So, you must watch out for heaters that have all the security features you need.

You should double-check that whatever fish tank heater you are looking at is rated for total submergence – if it can’t be submerged, there’s a risk of overheating, heater damage, leading to electrocuting yourself or your pet.

You’ll need to make sure too that the device has an automatic shut-off so as not to continue operating in case water levels change while immersed underwater!


You could be shocked to find out that not all betta aquarium heaters are adjustable. Instead, numerous economical heaters merely warm the water to a pre-programmed temperature.

How To Choose The Best Heater For Betta Fish 4

An adjustable aquarium heater is a great way to keep your tank at the perfect temperature. You can turn up on really chilly days and refuse the heating system when it’s warm outside, so you don’t have any nasty surprises with fluctuating temperatures!

Ease Of Use

You’ll want a heater that’s easy to control and use. Of course, your options for betta tanks will vary depending on what you’re looking for in your tank. But it is best if several features are available with simple controls so adjustments can be made quickly without needing constant attention from the user.

How To Choose The Best Heater For Betta Fish 5

Additionally, your betta heater should be very easy to install in your tank, with suction cups or a straightforward hanging device to get it below the water level.

It’s also worth checking if they come with sufficient cord length or not; too short cords could lead to troubles later down the line – plus give your friends jokes about ‘inadequate’ wiring!

Best Heater For Betta Fish: Reviewed

Best Titanium
hygger 50W Titanium Aquarium Heater for Salt Water...
hygger 50W Titanium Aquarium Heater for Salt Water...
Prime Status
Star Rating
81 Reviews
Check Details
Best Titanium
hygger 50W Titanium Aquarium Heater for Salt Water...
hygger 50W Titanium Aquarium Heater for Salt Water...
Prime Status
Star Rating
81 Reviews
Check Details
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If you’re looking for a heater that is very easy to install and won’t take up room in your aquarium, the Cobalt Aquatics Flat Neo-Therm Heater may suit your Betta tank!

This slim, flat design is an excellent selection if you are trying to save area. It has a super-flat style and a one-touch system that enables you to establish your aquarium temperature level range up to 96 ° F

The Cobalt Aquatics Neo-Therm was made to be an economical, energy-efficient heating system that can elevate a Betta tank temperature up to 11 °F over ambient temperature levels.

The Neo-Therm is a thermoplastic heater with an unbreakable outer covering. In addition, it includes a reversible holster that allows the heater to face inward or outward.

Easy to use a one-touch system with an LED screen that shows the current water temperature and the set temperature. The neo-therm digital thermostat is very accurate in temperature control.

The neo-therm has thermal protection wiring that will shut off the heating unit if it gets too hot. There are also integrated safety attributes such as short circuit security as well as reverse polarity defense.


  • It is safe & reliable.
  • Easy to install and use.
  • Covers a wide temperature range.
  • Compact.


  • It might be slow in action.
  • Relatively expensive.

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Are you looking for a little, utterly submersible heater to heat your Betta aquarium to the ideal temperature level? The Fluval M50 Submersible Heater is an excellent selection. This heating unit is assured to work successfully in your small Betta fish tank.

This heater is made for freshwater as well as marine fish tanks, up to approximately 15 gallons. The 50-watt model includes a smooth, portable design that blends in with the colors of your fish tank.

The Fluval M50 is also simple to clean, thus suitable for newbies. In addition, it includes an automatic shut-off security feature that turns on when the water temperature gets to the desired temperature level to ensure secure operations.

The Fluval M50 Submersible Heater is the perfect way to keep your Betta fish tank at an ideal temperature. It’s made with durable materials and features a sleek design, making it easy to install in any aquarium; plus, you can adjust temperatures quickly using computer calibrated thermostats!


  • Easy to adjust and use.
  • Very durable.
  • Suitable for saltwater & freshwater.
  • Mirrored finish, aesthetically pleasing. 
  • Sleek & compact design.


  • Glass makes it fragile.
  • Quite a bit long.

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I’ve been a fishkeeper for over 15 years currently, and I’m always searching for brand-new gizmos to make my life easier. Among the much more current things I discovered was this aquarium heater from Hygger, a superb one.

It’s made from Titanium which makes it very easy and also really resilient to tidy. In addition, this heater is pretty suitable for a Betta fish tank.

The Hygger Titanium Fishtank Heater comes with a thermostat controller that lets users set their desired temperature from 32°F – 104° Fahrenheit- so it will be easy for anyone!

The thermostat on the top is excellent for a lot more sensitive analyses and the precision of 0.2 degrees plus or minus!

Generally, this item gets my seal of approval because it’s well-crafted, easy on the budget, and effective in Betta aquariums heating water promptly. 

As the material of construction is Titanium, it is really sturdy. Also, as they hadn’t used glass, the Hygger heater is unbreakable and not vulnerable.

After installing it, you simply need to set your wanted temperature. This heating unit will quit when water reaches your desired degree of heat! It restarts at 1 ℉ less than the set temperature, as well as the total cycle is automatic.

Hygger heaters additionally have a straightforward controller with the “temp setup remember” feature, so if missteps take place during the setup procedure, do not stress over way too much trouble.

The digital display screen reveals temperature settings from an LCD monitor on either Celsius or Fahrenheit. An external thermostat gauges the water temperature, which shows up on the display screen.


  • Easy to install and use.
  • Safe to operate.
  • It is shatterproof and durable.
  • Accurate temperature control.


  • Relatively expensive.

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The FreeSea Aquarium Heater is a suitable heating system for a 1 to 10-gallon betta fish tank. Even though there are bigger alternatives that will help larger tanks.

This is one little practical heater that all of us require to have. The FreeSea Aquarium Heater is an excellent choice to warm betta aquarium anywhere between 59 to 94 degrees Fahrenheit, which naturally ought to suffice for all betta owners.

The FreeSea Aquarium Heater is a programmable temperature device that can maintain the perfect temperature and starts anytime below the set point. 

There’s nothing more to do than plug this thing in; set your desired setting with an easy-to-see digital display panel on top of it, so you don’t have any confusion!

It has dual safety protection built-in, which is excellent because it secures against overheating. However, this heater is ranked as amazon’s choice for Betta fish.

It has an oval form with a large LED display that plainly reveals the temperature of the water. It also includes advanced IC innovation to ensure risk-free procedure.

FREESEA Aquarium Submersible Heating system is a well-known brand name in the aquarium market. However, it has actually been created to meet all your demands and offer you even more self-confidence when it involves keeping your Betta aquarium at the right temperature. 


  • Compact to fit any shape.
  • The automatic turn on/off feature is reliable.
  • Easy to use and install.
  • The after-sale service is excellent. 


  • The power cord is too short.

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ZEETOON Fish Tank Heater is Suitable for all kinds of fish tank inhabitants, Betta, tropical fish, goldfish, and turtles. It can function in both saltwater as well as freshwater. So your little fish, as well as turtles, will no longer fear the wintertime!

ZEETOON is a betta fish heater that provides constant warmth for your family pet. It’s suitable for freshwater or marine, and it comes with two pieces of artificial plant to make the environment look extra cozy!

Unlike various other traditional heating systems, it does not need you to manually adjust the temperature. Instead, just plug the power wire, and it will certainly function. Because it features intelligent temperature control, which is extremely easy to use.

This automated heater for your Betta fish manages the temperature at 73ºF-82ºF(25 ℃ -28 ℃), with no requirement to adjust it.

The ZEETOON Betta Fish Tank Heater, made by heat-resistant ABS housing and sandy quartz filler and MCH Alumina ceramic heating system, anti-explosion & cracking. It is scald-preventing for your pets and also safe for you.

They provide 1-year of quality assurance for this product and substitute items for any product problems within 1 year after your acquisition.


  • Compact design.
  • Suitable for a wide range of aquarium inhabitants.
  • Easy to install and use.
  • Reliable design.


  • No option for temperature adjustments.

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Hydor Slim Heater for Bettas – the easy way to keep your betta fish at a healthy temperature. This heater is designed to fit under gravel and does not include a glass component. It can be positioned anywhere in the tank and provide consistent warmth to your fish, helping them stay active and energetic. 

Speaking of heaters with indication light, the Hydor Heater For Betta fish activates when it’s functioning. So thanks to the indication light, you will know if and also when the heating system is working.

The sign light reddens when it’s heating your betta tank and turns green when the preset temperature level is gotten to, which makes it really user-friendly.

A few of the attributes of the container heater include a built-in thermostat which is accountable for maintaining the water temperature level at a suitable level.

The slim design makes it easy to place this heater anywhere you want without worrying about space constraints. The heater’s trendy thing is that it can be placed in the container in any position you pick, from straight placement to upright.

You still need to make sure that it is placed inside the water before connecting it or turning it on. However, one of its downsides is that the heater can not be adjusted. 


  • Easy to install and use.
  • It can be installed horizontally or vertically.
  • Suitable for nano aquariums and Betta fish bowls.
  • The built-in thermostat is reliable.
  • Very compact.


  • The temperature cannot be adjusted.

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The Hygger Betta Tank Heater comes in three various power levels. From 300, 100, down to 50 watts. It is made from durable milky quartz coupled with an indicator light on one side of the heater.

Asides from these functions, it is a submersible heater with made external temperature insurer, which aids in adjusting the water temperature by just turning a pointer.

Why is it on my list of the best heater for betta fish? The answer lies in its safety and security features. The heater has the capacity to shut down instantly when it gets to over the set temperature.

An aquarium heater is an essential part of an aquarium. But many heaters could be huge and bulky, which takes up also much area. So Hygger developed this miniature digital display completely submersible fish tank heater for small fish tanks. 

It’s lightweight and small, so you can conveniently deliver it from one fish tank setup to another. In addition, it warms up rapidly, so you do not need to wait around all day for your tank water temperature level to increase!

And also, this little guy has an indicator light that tells you when it is heating and its current temperature at any time. This submersible heater includes 2 strong suction cups, which can be replaced if essential.

With a reputable thermostat, this heater can be utilized for over ten years. It’s safe to use and simple to install – no requirement for upkeep or replacement parts.

With its user-friendly controller, you’ll have the ability to establish it up with ease and also check every little thing from afar. In addition, if there’s ever a problem or question about your aquarium’s temperature readings, this display features both °F and °C.


  • Water-resistant heater.
  • Reliable and affordable.
  • Easy to use and install.
  • Ideal for betta fish and turtles. 
  • Digital display.


  • The controller is not waterproof.
  • Suction cups are not strong enough.

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Aqueon Flexible Aquarium Heater is a product that will undoubtedly ensure your Betta fish is happy and also healthy.

The glass tube in this heater is very efficient and distributes maximum heat throughout the entire aquarium. Moreover, it does so by convection, which is much more effective than conduction! 

This heating system includes an easy-to-read dial, flexible thermostat, and also top-quality materials. It’s also energy efficient!

The Aqueon heater is additionally easy to install as well as doesn’t occupy much room. These are just some of the benefits this item offers your office or home’s aquarium!

Aqueon products are backed by the company’s commitment to quality. If you experience an issue, Aqueon will ensure your item is replaced or fixed at no cost!

An adjustable heating system lets you set the desired water temperature level within 1 °F (68-88 °F). This heater is recommended for Betta fish tanks, approximately 20 Gallons in size.


  • It is a long-lasting, quality product.
  • Compact in design.
  • Easy to install and use.
  • Energy-efficient.


  • No display for showing water temperature.

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One more name on my listing of the best heater for betta fish is the Szelam Smart mini heater. So, when you think about an intelligently designed heating system, among the heater that ought to easily involve your mind is the SZELAM Smart Mini Aquarium Heater.

SZELAM Smart Mini Aquarium Heater is a fully submersible compact betta fish heater with 3 adjustable temperature settings. It’s designed for aquariums from 5 – 20 gallons. 

The size of this heater is petite, which can be hidden in the aquarium decoration, so it won’t affect your view. The color will not change even after prolonged use, and it’s safe to use. 

You can set the temperature according to your needs, or you can leave it auto-adjusting as well; just let the SZELAM do its job!

With this Smart Mini Fish Tank Heating system, a thermostat is not required. However, unlike some other heaters, a unique thermometer will certainly keep functioning within the set temperature.

The heater is straightforward to install, and also it’s easy to use. In addition, it comes with an instruction manual that will certainly aid you in setting it up effortlessly.

One of the fascinating aspects of the heating system is that it is constructed from high-grade material. So it is a sturdy, practical, and generally top-quality betta fish tank heater.


  • Easy to install and use.
  • Durable with good material of construction.
  • It consumes very low energy.
  • Compact design.


  • Sometimes it may work slow.

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Lastly, in the listing of the best heater for betta fish is the Eheim Jager Betta Aquarium Heater. In the league of the trustworthy heater, this set attracts attention. 

It is known to keep the temperature level of every fish tank continuously. All you have to do is put it in the predetermined array, and you are okay to go. The key to its accuracy lies in its ability to recalibrate.

When taken out from the fish tank (from the water), one other feature that makes this heater distinct is just how it often tends to go off. This safety measure makes it even much better than numerous various other tank heating systems out there.

It additionally has a placing brace and a suction cup which aids for an effortless setup. For every newbie around, this is one heater for betta fish tanks that’s easy to handle. 


  • Reliable temperature control.
  • Very durable heater.
  • The material of construction is quality-grade.
  • Inexpensive.


  • The length of the heater is inconvenient.

Why Do Bettas Need A Heater?

We all know that Bettas flourish in tropical waters, which are usually warmer than what you’d anticipate. Now picture putting your Betta into an aquarium full of water with the room temperature colder than they live; would it be alright for them?

This doesn’t necessarily mean that the Betta will die; however, will it remain in an excellent state? Obviously not! In cold water, Betta fish are susceptible to bacterial and fungal infections.

That is why the significance of a hot water heater can never ever be overemphasized. 

Asides from nice decoration, clean water, and feeding these Bettas sufficiently, you still need a tank heating system to put the water temperature at the ideal level that it should certainly be. 

Can A Heater Be Placed In A Betta Bowl?

One of the questions that often comes up for betta owners is – if they can put a heater in their bowl. Yes! You absolutely can, as long as your tank size matches up with what you need and it won’t fry them. 

I recommend getting either a 5-gallon or larger tank so there aren’t any problems when installing this device because too small may cause an overheating problem.

The Winner Heater For Betta Fish

Any of these 10 heaters can maintain your betta fish tank healthily as well as cozy. However, in my opinion, the Hygger Submersible Mini Aquarium Heater is the best choice for the Betta fish heater.

This heater has a reliable safety system and a user-friendly controller. In addition, the LCD display for current temperature and the indicator light makes this product incredible.

The following best one for me is the EHEIM Jager as it is a very affordable but the quality product at the same time.

If you have any queries or comments, please put that in the below comment box.

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