Best Heater For 100 Gallon Aquarium

Peter | 04-01-2026

Looking for some of the best Best Heater For 100 Gallon Aquarium? As you may know, there are dozens of brands available in the market such as Orlushy,SEAOURA,HiTauing,hygger,Soyon and some come with vastly different price tags. Let us help you out here – we have handpicked the Best Heater For 100 Gallon Aquarium for you.

To compile our list, we’ve researched and evaluated a range of the best-selling products on the market. We recommend Orlushy Best Heater For 100 Gallon Aquarium as our top pick because of its exceptional overall performance. Want to explore more options? Read on! There’s also a buying guide to help you make a wise shopping decision.

Editor's Choice
Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free
Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free
Premium Pick
SEAOURA Aquarium Heater, 800W Fish Tank Heater for 100-180 Gallon, Submersible Heater for Aquarium
SEAOURA Aquarium Heater, 800W Fish Tank Heater for 100-180 Gallon, Submersible Heater for Aquarium
Budget Pick
HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature
HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature

Top 10 Best Heater For 100 Gallon Aquarium

We researched and compared the top products in the Best Heater For 100 Gallon Aquarium category to provide you with these recommendations.

1. Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free

Orlushy Submersible Aquarium Heater,300W Adjustable Fish Tahk Heater with 2 Suction Cups Free
9.8

Orlushy

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  • 300W aquarium heater is suitable for 40 to 55 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 89F 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

2. SEAOURA Aquarium Heater, 800W Fish Tank Heater for 100-180 Gallon, Submersible Heater for Aquarium

SEAOURA Aquarium Heater, 800W Fish Tank Heater for 100-180 Gallon, Submersible Heater for Aquarium
9.5

Seaoura

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  • Temperature probe & Intelligent Controller800 Watt aquarium heater provides heat for 100-180 gallon tanks. Temp probe wire connects directly to the heating rod, allowing you to measure the temperature in more areas of the tank. Can be used as aquarium thermometer. External controller to set the temp, safer and more convenient. Package comes with suction cups to fix the heater and probe to avoid drifting
  • High/Low Temperature ProtectionSEAOURA's fish tank heater features over-temp protection. When the water temp exceeds the safety temp you set, or the heater or temp probe is exposed to air, it will automatically stop heating and activate an alarm sound to remind you to check the tank in time. 800W turtle tank heater length 13.58 in, power cord length 37.4+59 in, temp sensing cord length 19.68 in
  • Effective Heating Thermostat ControlHeater for fish tank will adjust its power according to the temp in the tank. When the water temp in the tank differs significantly from the set temp, the heater will quickly bring the water up to temp. When the water temp in the aquarium is close to the set temp, the heater will work at a lower power to heat up gently and consistently. This saves electricity and avoids sudden temp fluctuations that can cause stress to aquatic life
  • 0.1 Precise Temperature ControlShort press the button temp can be accurately controlled 0.1/, long press the button to quickly adjust 1/. The aquarium heater has a memory function, which can automatically restore the last set temp after a sudden power failure, no need to reset. Ideal for aquarium hobbyists, perfect for turtles, betta fish, tropical fish, ornamental shrimp
  • Led Digital DisplayThe large digital screen synchronizes the tank temp with the set temp, readable accurate and easy adjustment, heating status (red=heating in progress, white=heating completed), and real-time monitoring of the water temp, which prevents overheating/underheating in the aquarium. Fahrenheit and Celsius temp control range: 63-94/17-34. Convenient for you to monitor the temp of your aquarium tank
  • Upgraded Safety and DurabilityOur submersible heater for aquarium is built-in with thickened quartz heating tubes, and the housing is equipped with sturdy and heat-resistant ABS material, which can withstand cracks caused by impact or water pressure. Pure nickel alloy heating element lasts longer and generates heat faster. Suitable for freshwater and saltwater aquariums, reef tanks and aquascapes

3. HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature

HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature
9.1

Hitauing

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  • Rapid Heating and Two Temperature Control System300W aquarium heater is sutable for 40-75 gallon fish tank and made of the most stable nickel-chromium heating wire, which can quickly and stably conduct heat to the surroundings. It has a built-in temperature control system of Fahrenheit and Celsius(Temp range: 63-94/17-34). You can press and hold the button next to the controller for 2-3 seconds to switch.
  • Intelligent Water Sensor and Over Temperature ProtectionThis fish tank heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the heater is completely out of water or it rapidly heats beyond the set temperature, the indicator light will turn green in both cases to ensure the maximum safety of you and your aquatic organisms just like protecting our own safety.
  • Explosion-proof Quartz Glass Aquarium HeaterThe submersible aquarium heater is made of explosion-proof quartz glass material and a high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction, faster water heating and longer lasting. And the stronger black shell is a high temperature resistant ABS material which protect the fish, your aquatic organisms and you from scalding.
  • Accurate External Digital Display ControllerThe external IC temp controller of this aquarium water heater can show the water temp with 2 red LED digits. The temperature in Fahrenheit and Celsius is displayed, which can be switched by pressing and holding the button for a few seconds. To set the temp, just press the button over and over until the screen displaying the temp you desired, the setting is done and the led shows the current water temp again.
  • Wide Range of UseThis 300 watt adjustable aquarium heater is suitable for many occasions. The fish market is a common place for us. It can maintain the freshness of fish. They are also suitable for places where aquatic life such as fish tanks, aquariums, and small fish ponds are kept. There are strong suction cups on the heater guard and the thermometer, it's easy to install the aquarium heater no to the tank walls or bottom, please keep them fully submerged.

4. Orlushy Submersible Aquarium Heater,500W Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups

Orlushy Submersible Aquarium Heater,500W Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups
8.9

Orlushy

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  • Adjustable Aquarium Fish Tank Water Heater Sensitive and reliable thermostat maintains uniform temperature. Automatic shut off when the temperature is reached
  • 500W aquarium heater is suitable for 40 to 75 gallons aquariums,voltage 110-120V, power cord is 6ft, please choose the right wattage aquarium heater according to our size chart.
  • 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 89F allows for complete control of aquatic climate within a 1-degree difference.

5. hygger Aquarium Heater 300W/500W/800W/1000W, Submersible Fish Tank Heater with Digital LED

  • 300 WATTS AQUARIUM HEATER - 300W aquarium heater is suitable for 40 to 80 gallon saltwater and freshwater aquariums. The heater length is 10.8 inches, voltage 110-120V, power cord is 10.1 feet. Please select the appropriate wattage aquarium heater according to our size chart
  • OVERHEATING & OUT OF WATER PROTECTION - When the water temperature exceeds 94F or it is lower than the minimum water level, the heater will automatically cut off the power and stop heating, it will display an error code and sound an alarm until the water temperature is below 94F or the heater is completely immersed in the water. Error code: HH-high temp; LL-low temp; AUTO shut off-out off water. Multiple protection, let you get rid of "boiled fish"!
  • DIGITAL LED CONTROLLER - Temperature adjustable range: 59-93, Accuracy1F. You can use the included bracket to mount the controller on the edge of the tank to adjust the temperature without reaching into the water. LED controller shows the current water temperature, preset temperature, working power and more warning sign of Low/ Hi temperature/ Auto shut off. Very easy to operate!
  • EFFICIENT AND EXPLOSION PROOF - The aquarium heater is made of explosion-proof quartz glass and high-temperature resistant nickel-chromium heating wire. This results in faster water heating, safer, and more longer-lasting. The heater guard is made of high quality PC plastic to protect your fish from burns
  • COMPLETE ACCESSORIES AND WARRANTY - This aquarium heater comes with accessories you need. Package includes 1 aquarium heater, 1 controller, 3 suction cups, 1 bracket and 1 hook. It offers 12 months warranty.

6. Soyon Aquarium Heater 500 Watt, Fish Tank Heater with Adjustable Temperature 55 Gallon 75 Gallon to

  • SPECIFICATION: Aquarium heater 500Watt, 110-120V, 17.7 inch long, suitable for large fish tank 55 gallon 60 gallon 65 gallon 70 gallon 75 gallon 80 gallon 90 gallon 100 gallon water
  • WIDELY TEMPERATURE RANGE ADJUSTMENT: Adjust and maintains at temperature range from 68F to 94F. The recommended temperature range for most fishes is 76 to 80F, the LCD Digital Aquarium Thermometer helps to measure the water temperature, ensure the fish tank heater work more steadily
  • ACCURATELY TEMPERATURE CONTROL: The fish tank water heater works in intermittent operation mode and will automatically power on/off to achieve the setting temperature constantly and stably, provide a constant warm environment for your tropical fishes to stay healthy
  • HIGH SAFETY: This 500watt aquarium heater has more than 2mm Thick Quartz Glass providing explosion-proof, shatterproof, IP68 waterproof, and scald-preventing with plastic cover to your fishes or other aquatic pets
  • 180 Days WARRANTY GUARANTEE: Our aquarium heater supply 6 months long warranty to you, guarantee to service you any time as soon as you contact us

7. HKLWAEE Aquarium Heater 500W, Fish Tank Heater 55 Gallon 75 Gallon 80 Gallon 90 Gallon 100 Gallon

HKLWAEE Aquarium Heater 500W, Fish Tank Heater 55 Gallon 75 Gallon 80 Gallon 90 Gallon 100 Gallon
8.3

Hklwaee

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  • SPECIFICATION: Aquarium heater 500 Watt,11.0 Inch long, 110-120V, suitable for middle and large fish tank 55gallon 60 gallon 65 gallon 70 gallon 75 gallon 80 gallon 90 gallon 100 gallon freshwater and saltwater
  • External Adjustment Button: This 500W fish tank heater can be set and adjust the temperature more conveniently and safety. Widely temperature control range from 59F to 93F, suitable for most fishes and other pets(The recommended temperature range for most fishes is 76 to 80F)
  • Easily Temperature Adjustment: Aquarium heater 500W with external adjustment button and digitial LED display, press and hold the button 3S to switch and . Each press will +1. Red light is on when heating and Green light is on when temperature is holding
  • HIGH SAFETY PROTECTION: Over-heating, Over-temperature, and lack of water protection, Anti-dry burning, the aquarium heater also provides explosion-proof, shatterproof, IP68 waterproof, 500 Watt aquarium heater bring high safety and suitable water living environment to your lovely fishes and other pets
  • ACCURATELY TEMPERATURE CONTROL: The fish tank heater works in intermittent operation mode and will automatically power on/off to achieve the setting temperature constantly and stably, provide a constant warm environment for your tropical fishes to stay healthy
  • 180 DAYS WARRANTY GUARANTEE: Our aquarium heater 500watt supply 6 months long warranty to you, guarantee to service you any time as soon as you contact us.

8. hygger Aquarium Heater 300W/500W/800W/1000W, Submersible Fish Tank Heater with Digital LED

  • 500 WATTS AQUARIUM HEATER - 500W aquarium heater is suitable for 66 to 135 gallon saltwater and freshwater aquariums. The heater length is 10.8 inches, voltage 110-120V, power cord is 10.1 feet. Please select the appropriate wattage aquarium heater according to our size chart
  • OVERHEATING & OUT OF WATER PROTECTION - When the water temperature exceeds 94F or it is lower than the minimum water level, the heater will automatically cut off the power and stop heating, it will display an error code and sound an alarm until the water temperature is below 94F or the heater is completely immersed in the water. Error code: HH-high temp; LL-low temp; AUTO shut off-out off water. Multiple protection, let you get rid of "boiled fish"!
  • DIGITAL LED CONTROLLER - Temperature adjustable range: 59-93, Accuracy1F. You can use the included bracket to mount the controller on the edge of the tank to adjust the temperature without reaching into the water. LED controller shows the current water temperature, preset temperature, working power and more warning sign of Low/ Hi temperature/ Auto shut off. Very easy to operate!
  • EFFICIENT AND EXPLOSION PROOF - The aquarium heater is made of explosion-proof quartz glass and high-temperature resistant nickel-chromium heating wire. This results in faster water heating, safer, and more longer-lasting. The heater guard is made of high quality PC plastic to protect your fish from burns
  • COMPLETE ACCESSORIES AND WARRANTY - This aquarium heater comes with accessories you need. Package includes 1 aquarium heater, 1 controller, 3 suction cups, 1 bracket and 1 hook. It offers 12 months warranty.

9. HiTauing Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water

HiTauing Aquarium Heater, Upgraded 300W/500W Fish Tank Heater with Intelligent Leaving Water
7.9

Hitauing

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  • Explosion-proof Quartz Aquarium HeaterThis 300W submersible aquarium heater is made of high-quality quartz glass tube, it's very durable and explosion-proof. The aquarium heater can be used for freshwater and saltwater aquariums, it is pretty shatter-proof and blast-proof and prevents electricity leakage. The stronger black ABS protective shell is easier to hide and prevents scalding, protect you and your aquatic pets on all fronts!
  • Rapid Heating SystemThe fish tank heater is suitable for 40-75 gallon tank, the voltage of the aquarium heater is 100-120V/50-60HZ, power 300W, Universal two-pin plug, heater rod length 12.99 inch, power cord is 98.5 inches long, Temp range: 63-94/17-34. The heating wire is nickel-chrome wire which can conduct heat quickly and fully adequate heat dissipation to achieve rapid heating effect.
  • Sensitive Temperature Control ProbeThis aquarium heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the aquarium heater head is 5cm out of water, the digital screen will display "E1", green light flashing or it rapidly heats beyond the set temperature, the indicator light will turn green to ensure the maximum safety of you and your aquatic organisms.
  • Digital LED Display ControllerThis aquarium heater has two temp control systems, temp control range: 63-94/17-34. The controller displays real-time water temp on the top and set water temp on the bottom, you just need to press and hold the button over and over again to finish setting the temp, the red light on means start heating, the green light on means stop heating, long press the thermostat button for 5 seconds to switch between and directly at will.
  • Removable Aquarium HeaterThe shell of this aquarium heater can be disassembled into 4 sections, you need to press the clips and then push outward to pull off the housing. There are 2 strong suction cups on the heater guard, it's easy to install the aquarium heater no to the tank walls or bottom, please keep them fully submerged before plugging in. The heater is suitable for many occasions such as aquariums, betta fish tanks, turtle tanks, small fish ponds and aquarium market.

10. MantaMaze Aquarium Heater 300W/500W/800W/1000W for 20-300 Gal, Fish Tank Heater with Intelligent

MantaMaze Aquarium Heater 300W/500W/800W/1000W for 20-300 Gal, Fish Tank Heater with Intelligent
7.7

Mantamaze

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  • Newly Upgraded QualityTwo super-tough heating tubes are made of explosion-proof quartz glass and high-temperature-resistant nickel-chrome heating wires, distributing heat evenly and heating water faster. The shell is made of V0-rated flame retardant plastic which is corrosion and heat-resistant and prevents fish from touching the heater, thus preventing them from getting burned.
  • Multiple Security ProtectionWhen the water temperature exceeds 94F or the top of the submersible aquarium heater is 2 inches above the water surface, the heater will automatically cut off the power and stop heating, it will display an error code and sound an alarm until the water temperature is below 94F or the submersible fish tank heater is completely submerged in the water.
  • External Digital ControllerAdjust the temperature without putting your hand in the water. The LED controller can show the current water temperature, preset temperature, and more warning signs of High temperature/ out of the water. The running red light means the heater is heating, and the running green light means the water temperature has reached the set temperature.
  • Precise Control TemperaturTemperature adjustable range: 63-94, hold the "+" and "-" for 5 seconds to switch between and . Accuracy: 1F, the adjustable aquarium heater will stop heating when the temperature reaches the setting and restart when it is lower than the setting. The memory function can automatically retain the previous setting when the adjustable fish tank heater is restarted.
  • Wide Range of Applications300W aquarium heater for 20-80 gallon tanks, please select the appropriate wattage according to our parameters. This fish tank water heater can be widely used in freshwater and saltwater fish tanks, turtle tanks, and aquariums. You can easily mount the aquarium water heater to the tank wall using the included suction cups to maintain the decoration style of your tank.

Peter

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