Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm

Recommendation No. 1
Orlushy Submersible Aquarium Heater 300W-Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups Suitable for Marine Reef Fish Tank Sump - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • ★300W aquarium heater is suitable for 50 to 80 gallons aquariums,Length - 11 inch,voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.
  • ★It shows an area to adjust the temperature. It's not exactly accurate but it turns easy and can be adjusted at small intervals.
  • ★Explosion Proof: 2mm thickened quartz glass,can be used in fresh water and salt water aquariums,easy to hide in the tank.
  • ★Precise temperature dial from 68 to 89°F allows for complete control of aquatic climate within a 1-degree difference.
  • ★Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature. Automatic shut off when the temperature is reached
Recommendation No. 2
FREESEA 50W Mini Aquarium Heater Fish Tank Submersible Heater with LED Temperature Display - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • ★ Temperature range: 59°F~94°F, display Fahrenheit °F, this heater is designed for1~10 gallons tank.
  • ★ Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.
  • ★ Touch button, cyclic adjust temperature , easy to use and Safety.
  • ★【Note】:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
  • ★【SATISFACTION GUARANTEED】Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.
Recommendation No. 3
U-picks Submersible Aquarium Heater 500W/300W/100W Fish Tank Heater with Dual Intelligent External LED Digital Temperature Displays and Controller for Turtle Betta Fish Tank 80-130 Gallon (500W) - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • [Fully Submersible Aquarium Heater]---Voltage 110-120V/60HZ, power 500 watt, heater rod length 10.8 inches, suitable for aquarium/fish/turtle/betta tank 80-130 gallon. The controller power cord is 47 inches, The heater power cord is 67 inches and the temperature control range from 68~93°F.
  • [Smart Heating]---When the water temperature is lower than the set temperature (red indicator), the fish heater starts to work until the water temperature reaches the set temperature (blue indicator). It can always provide stable water temperature for your beloved fish.
  • [External Controller]---This 500W submersible heater is adjusted by an external controller, which you can mount on the outside edge of the tank. It’s convenient and safe for you to set the temperature, no need to take the heater out from water and risk burning yourself.
  • [Dual Temp Displays]---With dual accurate LED digital temperature displays, you can read & set the water temperature at the same time. It is very easy and convenient for you to recognize and observe the temp change in real time even in the night!
  • [High Quality Material]---Made of thicker quartz, this heater is shatter-proof and blast-proof. The heater cover is compact designed, which is heat resistant that will protect you little fish from scalding. Strong suction cup bracket help stably fix the heater in every corner of the fish tank.
Recommendation No. 4
boxtech Aquarium Heater 300W, Submersible Fish Tank Thermostat Proof Explosion and Auto Digital Control, with Heat-Resistant Quartz Made for 5-80 Gallon - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • Fish Tank Heater: 300W aquarium heaters suit for 30 - 80 Gallon fish tank. Voltage:110V, power cord is 5.57ft, Max deep water immersion 20 inch/1.7 FT
  • Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water flow.(This way the heater can quickly sense the water temperature and make adjustments automatically), Keep the aquarium heater fully submerged in water
  • Fully Automatic Control: Design with External Temperature Controller, Temperature Range is 68 ºF-90 ºF, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating
  • Quartz Tube Safety Protection: Made of heat-resistant milky quartz Glass and UL-Approved Power Cord, Controller IPX4, Heater IPX8 that make it pretty shatter-proof and Explosion-proof and prevents electricity leakage, service life can be 3 years or more
  • Notice Please: Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater
Recommendation No. 5
VIVOSUN 200W Aquarium Heater Submersible Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • PRECISE TEMPERATURE CONTROL: An intelligent IC chip controls the heater temperature, making the temperature difference within ±1℃/±2ºF; Provide the best living environment for your aquatic creatures
  • SAFETY GUARANTEE: Made with IP68, the highest waterproof level; and a titanium tube material that features explosion-proof and anti-corrosion engineering, which makes this submersible heater more resistant to damage while heating better than traditional glass heaters; Built with overheat and water shortage protection
  • EXTERNAL TEMPERATURE CONTROLLER: The touch-button controller adjusts the temperature without getting your hands wet. It’s easy to control the temp from 68℉/20°C to 94℉/34°C; Check the size chart to find your desired fish tank heater
  • EASY TO SETUP: 200W submersible heater is suitable for 21.1 to 39.6 gallons aquariums; Vertical or horizontal installation and ensure the device is fully submerged underwater
  • WIDE COMPATIBILITY: The fish tank aquarium heater has CE, FCC and ROHS certification and the plug has a UL certification; Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems
Recommendation No. 6
Zacro Submersible Aquarium Heater of 300W with Visible Temperature and Floating Thermometer with Suction Cup Black - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • Waterproof and Double sealed material--Plastic and black protective container for Scald-preventing and anti punching
  • Apply to sea water and fresh water .Easy to install and use
  • Visible temperature setting, Temperature adjustable of between 65F - 93F
  • Tank capacity: up to 99 Gallons, Voltage/freq: 110-120volt/60hertz
  • Provided with an thermometer to show the accurate tank temperature to avoid overheat or freeze.
Recommendation No. 7
Mylivell Aquarium Heater Submersible Auto Thermostat Heater,Fish Tank Water Heater and Adjustable Temperature with Suction Cup-50W - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.
  • Adjustable Temperature: The temperature of the fish tank heater can be adjusted automatically. Temperature setting range: 20°~34°C(65° F - 93° F), and the display is easy to read.
  • Fully Submersible. Power: 50W. Suggested water volume: 20gal.
  • Both suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.
  • Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank. The polarized plug prevents electrical shock.
Recommendation No. 8
auomii Mini Submersible Aquarium Heater, 50W/100W Small Fish Tank Heater, Built-in Thermometer, 2 LED Temperature Display, External Temperature Controller, Intelligent Frequency Conversion(50W) - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • 【Small Size Heater】 AUOMII 50W small size aquarium heater is suitable for 1~10 gallon mini fish tanks, and easy to hide in the tank. Temperature can be accurately adjusted from 64~93°F. This heater suitable for both saltwater and freshwater. The rated voltage is 100-130V. Easy to set temperature, Easy to read temperature, Easy to install
  • 【Intelligent Frequency Conversion Technology】Temperature accuracy is up to 1℉ as advanced Intelligent Frequency Conversion Technology. If the temperature is lower than the target value of 0.2°F, the heater works at a variable frequency to keep the temperature constant. The working frequency will be changed according to temperature variation. If the water temperature is lower than the target temperature of 1°F , the heater will work at full power. The temperature curve is almost a line
  • 【Safety and Reliable】3 pin plug with ground wire, connect the water to ground directly, no risk of electric shock. 4 protections: Leakage protection / Over heating protection / Dry running protection / Out of water protection. Sturdy engineering plastic shield, scalding resistant and explosion resistant. Using touch control button, easy to set and read the temperature. 3 Strong suction cups, easy to install
  • 【Built-in Thermometer】Water temperature will be displayed on both the heater and external temperature controller in real time. Dual built-in temperature sensor. Dual LED display. High accuracy temperature as the temperature sensor is contact with water directly and have excellent heat conduction
  • 【30days refund 12 months replacement】Your purchase today is completely RISK-FREE. If you are not completely satisfied for our device, let us know for a full refund. Why wait? Get it today
Recommendation No. 9
POPETPOP [Upgraded 400W Aquarium Heater - Submersible Titanium Fish Tank Heaters with Intelligent LED Temperature Display - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • √ [UPGRADED] MORE PRECISE TEMPERATURE - Upgraded sensing probes on the top of heater provides more precise induction that reduces temperature error which allows you check the temperature of the aquarium more easily to prevent the difference temperature in water from making the fish sick.
  • √ [UPGRADED] DURABLE HEATING WIRE - The aquarium heater was changed from the original iron-chromium wire to the nickel-chromium wire to ensure the heater has longer life and precisely control heater temperature. It is extremely durable and stable, and faster heating than normal glass heaters.
  • √ SAFETY PROTECTION - The fish tank aquarium heater has CE, FCC and ROHS certification. When sensing probe is exposed in the air or detected the water is overheating, the heater will stop heating. Giving your aquarium fish, amphibians, turtles safety protection.
  • √ EASY TO ADJUST TEMPERATURE - LED digital display temperature that is easy to observe the temperature set by the heater. Using intelligent IC chip for more precise temperature control with less error (±1°C/±2℉). The touch button ensures that the hand is not wet when adjusting the temperature.
  • √ SIMPLE OPERATION - The 400w fish tank heater can be used in 70-80gal gallon fresh water and salt water aquariums. Easy to set temp from 20°C ~ 34°C(68℉~ 94℉). Note: Don't expose the heater out of water surface as this may cause damage to the heater.
Recommendation No. 10
Mylivell Aquarium Heater 100 W Submersible Fish Tank Water Heater Thermostat - Best Submersible Aquarium Heaters to Keep a Fish Tank Still Warm
  • High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.
  • Adjustable Temperature: The temperature of the fish tank heater can be adjusted automatically. Temperature setting range: 20°~34°C(65° F - 93° F), and the display is easy to read.
  • Fully Submersible. Power: 100W. Suggested water volume: 20 gal.
  • Both suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.
  • Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank. The polarized plug prevents electrical shock.

A submersible aquarium heater is a heater you put inside a saltwater or freshwater aquarium to regulate the water’s temperature. Without a heater, fish can struggle to thrive and may even die in water that is too hot or cold.

A submersible heater features a titanium rod and heating elements which sit immersed in the water for the entirety of its life. They provide accurate temperature readings and ensure the water remains at a safe level for the health of your fish.

The market is full of options, but it can take some sifting through them to work out which ones will tick all the boxes for your breed of fish. Take a look at these and see if any stand out.

1. FREESEA Submersible Aquarium Fish Tank Heater

If you want your fish to survive and thrive, then make sure you take a closer look at this submersible aquarium heater from FREESEA. While there are plenty of standout heaters on the market to make sure your fish are comfortable, very few are as advanced and as affordable as this one.

Firstly, you can choose from a 200 or 300-watt option – both of which are bound to suit your tank size of choice. It then has an LED temperature display to show up the accurate temperature of the water. However, the sticking point of this is that there is no Fahrenheit display – only Celsius. This might not appeal to all people. In saying that, its range is still 59 to 93 degrees-Fahrenheit, so it will still be suitable for most freshwater and saltwater setups regardless.

If you happen to turn off the submersible aquarium heater – be it for cleaning or another reason, it’s also going to remember what you set it at once you turn it back on. This is all thanks to the memory function this heater has to offer. Benefit from a precise temperature, compatibility with a broad range of tanks, and an affordable price tag. If you are struggling to find the perfect heater appliance for your aquarium, it won’t hurt to look at this one from FREESEA.


  • 200 and 300-watt options
  • LED temperature display
  • Intelligent thermostat technology
  • 59 to 93 degrees-Fahrenheit temperature range
  • Freshwater and saltwater compatibility
  • Power-off memory function


  • It remembers your temperature preference from when you turn it off to on
  • Affordable price tag
  • Displays your temperature clearly
  • Straightforward to set up
  • The temperature is effortless to maintain
  • Ideal for many different tank sizes


  • It only shows the temperature in Celsius, not Fahrenheit

2. ViaAqua Submersible Heater

Even though this submersible aquarium heater from ViaAqua is more fragile than other units on the market, meaning you need to be more careful, you are still going to love how accurate and useful it is for regulating your aquarium’s water temperature. There’s no denying you are going to have to be more careful, but that doesn’t mean that once it’s safely inside your tank, it won’t operate as effectively as others.

This model of submersible aquarium heater comes with a built-in thermostat and is available in four wattage options – 50, 100, 200, and 300. They all feature quartz glass tubing for extra durability, as well as being fully submersible for an added touch of convenience. What will also have you reaching for the ‘buy now’ button is that they are suitable for both freshwater and saltwater tanks. No matter what fish you have, this submersible aquarium heater can regulate the water temperature well.

To adhere the heater to your tank is effortless as well. It comes with suction cups that sit firmly on your tank to regulate the temperature and make sure it’s consistent throughout. If the time has come to buy an affordable and high-quality submersible aquarium heater, check this one out from ViaAqua.


  • Built-in thermostat
  • 50, 100, 200, and 300-watt options
  • Quartz glass
  • Freshwater and saltwater compatibility
  • Suction cup installation
  • Fully submersible


  • Plenty of wattage options to suit
  • Extra-thick quartz glass
  • Easy installation with suction cups
  • Ideal for saltwater and freshwater tanks
  • Affordable price tag
  • You can use it in a range of tanks
  • Comes with double insulation
  • Safe to use


  • It doesn’t have a protective rubber end to stop you from dropping and damaging it
  • You have to calibrate it to your tank, so it’s accurate
  • More fragile than other submersible aquarium heaters on the market

3. Hygger Submersible Fish Tank Heater

Maintaining water temperature in your aquarium is crucial, but without the best submersible aquarium heater money can buy, it’s a losing game. Don’t let your fish die because you chose the wrong heater. You may find this one from Hygger is all you need to take care of your fish now and into the future.

With a service life of three years or more, it’s already ahead of the competition. Many other heaters on the market do not last longer than a year. You can also choose whether you want with 50, 100, or 300 watts to suit your specific setup.

Everything about this submersible aquarium heater is going to impress. It has an adjustable betta heater, an external temperature controller, and nine heater options too. You can rotate the dial, select your preferred heat, then leave it to work. You may also like to check the built-in thermometer from time to time to see if it’s still working well, as some people notice that it can fail to maintain temperature over time.

This submersible aquarium heater also has a conveniently long power cord, so you don’t always need to be near power, as well as being waterproof and explosion-proof. It’s more expensive than other models, but given its extensive feature list, it’s worth its weight in gold.


  • Adjustable betta heater
  • External temperature controller
  • 50, 100, and 300-watt options
  • 5.4-foot power cord
  • Automatic shut-off safety function
  • Heat-resistant milky quartz tubing
  • Explosion-proof
  • Three-plus year service life
  • Waterproof
  • Nine heater options
  • Built-in thermometer


  • Long service life in comparison to other models
  • It has plenty of safety features
  • The range of wattage options
  • Robust tubing
  • It won’t explode
  • Entirely waterproof
  • Plenty of heating options
  • Long power cord for convenience


  • Not easy to maintain a temperature sometimes
  • Overheats quickly with no water

4. MWGears Submersible Aquarium Heater

Maintaining the water temperature in your fish tank is crucial, and if you don’t have a submersible aquarium heater, there’s a genuine risk your saltwater or freshwater fish could perish. Don’t take the chance. Instead, invest in an MWGears submersible aquarium heater that ensures your water temperature is correct for your fish to thrive.

You can choose a heater that’s either 300 or 500 watts, and enjoy all the safety features that come along with it. While it’s more expensive than other heaters on the market, you pay for quality. It has double-seal material, titanium stainless steel, and it’s also explosion, shatter, and waterproof too. Sealing the deal is the use of high-strength engineering plastic which adds that final touch.

Make use of the adjustable and intelligent temperature chip control system, as well as the convenient placement of the submersible aquarium heater vertical or horizontal. Everything about this heater is with your convenience in mind, so if you want a heater that will look after your fish and provide accurate heating readings, this one is it.


  • 300 and 500-watt options
  • Titanium stainless steel
  • Double-seal material
  • Explosion-proof
  • Shatterproof
  • Waterproof
  • High-strength engineering plastic
  • Adjustable temperature
  • Intelligent temperature chip control
  • Fully-submersible
  • Vertical and horizontal placement


  • It heats the tank quickly
  • Maintains a temperature well
  • You can place it in the tank vertically or horizontally
  • It caters for larger tanks
  • It’s safe to use
  • It features premium materials


  • You have to replace them after one year of use
  • Poor-quality instructions

5. HITOP Submersible Aquarium Heater

If you have a 60 to a 120-gallon aquarium and you’re in need of a way to regulate the water temperature with a submersible aquarium heater, then you’ve come to the right place. This HITOP heater is an excellent example of a premium heater and will deliver on its promise to regulate your tank heating at all times.

It’s available in a 300-watt option to suit a range of 60-120-gallon tanks and is also effortless to set up and begin using. It’s also only 11 inches long – being more than suitable for smaller tanks with not a lot of space to spare.

Instead of easy-shatter heating tubes which frequently appear in most submersible aquarium heaters, this one bucks the trend. It has a PTC oxide ceramic element which will not shatter, bust, or rust. It’s everything you could want it to be and more. This unit also comes with an additional stick-on thermometer to ensure you get an accurate reading, as well as six suction cups to keep it firmly in place inside your tank. Even though you don’t pay a lot for this submersible aquarium heater, you get premium bang for your buck every time.


  • 300 watts
  • PTC oxide ceramic element
  • 60-120-gallon capacity
  • 11 inches long
  • Titanium oxide heating ceramic
  • Stick-on thermometer included
  • Section cups
  • Two-year warranty


  • Compact size
  • Affordable to buy
  • Tubing that won’t shatter
  • Accurate temperature control
  • Rapid heating
  • Generous warranty period
  • Extra suction cups to keep it securely in place


  • Only one wattage option

6. Cobalt Aquatics Aquarium Heater

A submersible aquarium heater shouldn’t take up a lot of room in your aquarium – as the more it does, the fewer fish you can have. Fortunately, this submersible aquarium heater from Cobalt Aquatics solves an all-too-common problem of a lack of space and has downsized its heater range to a more manageable size.

While the heater is small, it doesn’t mean you get any less of a product. You can buy this submersible aquarium heater in 100, 75, and 50-watt ranges, servicing different size fish tanks. They are also only a third of an inch thick, meaning they take up minimal space while still keeping your water temperature at between 66 and 96 degrees-Fahrenheit.

The casing is shatterproof for your peace of mind, it’s a premium neo-therm product that’s almost indestructible, and it has an LED display so you can see the water temperature at all times. What’s more, this submersible aquarium heater is affordable for all, ideal for saltwater and freshwater, and has a one-touch control system. Even though some people think it loses its accuracy over time, it’s still a standout product in an overcrowded submersible aquarium heater market.


  • 50, 75, and 100-watt options
  • 1/3-inch thick
  • Shatterproof
  • European-made
  • Three-year warranty
  • Neo-therm
  • One-touch control system
  • LED display
  • 66 to 96 degree-Fahrenheit range
  • Shatterproof casing


  • Regulates the temperature well
  • Lovely style
  • Affordable to buy
  • Premium materials
  • It won’t shatter
  • You can set the temperature with one button
  • It’s safe and reliable
  • You can use it in saltwater and freshwater


  • The temperature reading can be inaccurate

7. FREESEA Aquarium Fish Tank Heater

The next time you’re on the hunt for a new submersible aquarium heater, don’t look past this one from FREESEA. Don’t let the low-end price tag fool you into thinking it’s an inferior quality product – because it’s anything but.

Firstly, the variety is exceptional. It doesn’t matter what size tank you have; there is a submersible aquarium heater to suit. You can buy them in 300, 200, 100, 75, and 50-watt options. Each submersible aquarium heater also has a temperature range of between 59 and 94 degrees-Fahrenheit. However, it displays the temperature in Celsius only which can be a sticking point for some people.

If the temperature display doesn’t put you off, then you will enjoy other features on offer. You can immerse the heating rods entirely in water, benefit from the red LED display that looks stylish and cool, and the touch buttons as well. It’s also effortless to adjust the temperature, and you get peace of mind from a one-year warranty. This affordable submersible aquarium heater is going to make your aquarium setup complete!


  • 50, 75, 100, 200, and 300-watt options
  • 59 to 94 degrees-Fahrenheit range
  • Touch buttons
  • Cyclic adjustable temperatures
  • Fully immersible heating rods
  • One-year warranty
  • LED display


  • Affordable to buy
  • Plenty of wattage options
  • Straightforward to set up
  • Suitable for many tanks
  • Provides a regular temperature
  • Compact size
  • Safe to use


  • Fish can get stuck in the coils
  • The red LED shows up brightly at night
  • It stays in Celsius instead of Fahrenheit too

8. SZELAM Submersible Aquarium Heater

If you don’t want to spend the earth on a submersible aquarium heater, because your setup already cost a fortune, then you might like to consider this heater from SZELAM. Even though it’s not from the most well-known heater supplier, this heater is an exceptional example of value for money. You pay very little to buy and operate it, but you get continued reliability in return.

When you buy this submersible aquarium heater, you get to choose from a 50, 100, or 300-watt option. Each will be suitable for a different volume of water. It features a protective sleeve to stop electrocution and damage to your fish or aquarium, as well as impermeable sealed technology to reiterate that trust in the submersible aquarium heater. It won’t shatter, rust, and features 1.55mm-thick quartz glass.

When it comes to maintaining a regular temperature, this submersible aquarium heater tries its hardest. It adheres to the wall of your tank with suction cup clamps and offers a temperature range between 68 and 94 degrees-Fahrenheit. It also shows the temperature on a digital gauge. For the most part, it’s an accurate reading, but some customers have had trouble.

Rather than spend a fortune to regulate your water temperature, pay less and get ultimate bang for your buck with SZELAM.


  • 50, 100, and 300-watt options
  • Protective sleeve
  • 1.5mm-thick quartz glass
  • Shatter-resistant
  • Impermeable sealed technology
  • Suction cup clamps
  • 68-94 degrees-Fahrenheit range
  • Digital temperature gauge


  • Affordable price tag
  • Plenty of options to suit different tank sizes
  • You can use it with fresh or saltwater fish tanks
  • The thermometer is accurate
  • Maintains a regular temperature
  • Effortless to set up
  • The sleeve stops shocks and makes sure your fish are safe


  • The suction cups are not reliable
  • the thermometer can be inaccurate for some people

9. Hygger Titanium Aquarium Heater

Even though you may not like to buy a submersible aquarium heater from a no-name brand, you will change your mind once you give this one from Hygger a chance. Of course, it’s not a leading brand yet, but once more people find out about what it can offer, it won’t be long until it becomes one.

This submersible aquarium heater has many standout features that will see you buying more than one for your aquarium setup. It has titanium tubing that won’t rust or shatter, comes in 200, 100, or 50-watt options, and you can use it in a tank with between 20 and 45 gallons of water.

When it comes to heating your tank correctly, this submersible aquarium heater delivers. It has a generous heating range of between 32 and 104 degrees-Fahrenheit but can display the temperature on the LCD screen in Celsius or Fahrenheit depending on your preference. It’s also ideal for many tanks and will distribute heat effectively as long as you secure it with its two suction cups near a flow of water. With an affordable price tag to seal the deal, there’s every reason to consider purchasing this submersible aquarium heater from Hygger.


  • Titanium tubing
  • 50, 100, or 200-watt options
  • Two suction cups
  • Easy-mount system
  • Low to high controller
  • Shatterproof
  • Anti-corrosion
  • Dual LCD
  • 32 to 104-degree heating range
  • Automatic shut-off system
  • 20-45-gallon tank capacity


  • You can view the temperature in Celsius or Fahrenheit
  • It has a broad temperature range
  • Affordable price tag
  • Secures in place firmly
  • It won’t shatter or rust
  • Suitable for many tank types
  • Accurate thermometers


  • You have to run it near a high flow for even heat distribution

Considerations for Purchasing a Submersible Aquarium Heater

If you have an aquarium with freshwater or saltwater fish, you will learn soon enough the implications of not having a submersible aquarium heater – or having an inferior quality one. Without proper water temperature regulation, your fish can fail to thrive – and can even die. You can’t pick the cheapest model with the least features and hope for the best. Instead, you need to think about what your fish require and whether the heater you have picked is up to the task. Here is how to work it out.

  1. WattageThe wattage of your submersible aquarium heater of choice matters a lot. The lower the wattage, the smaller space it can heat. Before you jump online and begin looking for a new heater, make sure you know how many gallons your aquarium is. Most heater suppliers will tell you the size aquarium their heaters will suit. The higher the wattage, the warmer the water.
  2. Heat rangeSome fish require a particular water temperature to survive, so you need to read all the fine print of each submersible aquarium heater to make sure the one you choose is the one to tick all the boxes for their needs. Most sit between 50 and 90 degrees-Fahrenheit.
  3. DisplayMost people in the United States are familiar with temperatures in Fahrenheit as opposed to Celsius. However, some submersible aquarium heaters on the market only display the temperature in Celsius. While it’s not the end of the world if you have to convert it to Fahrenheit in your head, it’s going to be more convenient if you choose a heater that suits what you prefer to begin with. Most also have LED or LCD screens.
  4. LongevityYou could spend hundreds of dollars on a new submersible aquarium heater, but the reality is, they don’t last forever. Lower-end models can fail long before the year is up, while even the more expensive ones can provide faithful service for around three years. Because they spend their entire life in water, they are continually working hard to keep it warm and protect the fish from electrocution.

    Working so hard means they burn out. Read the fine print and choose a submersible aquarium heater that lasts the longest time – even if you have to pay a little more for this guarantee and a warranty. It can save you a lot of hassle in the long-term.

Last update on 2021-01-24 / Affiliate links / Images from Amazon Product Advertising API

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