Editor's Choice - Our Favorite Inline Aquarium Heaters

1. Hygger Mini Inline Quartz Glass Aquarium Heater with External Controller, Adjustable Submersible Bet...

User Ratings: 70 6

hygger First Impressions

"Great heater."

Keeps the water consistent and it's easy to adjust! The controller is easy to use, very accurate and reliable. I like the fact that it comes with a digital thermometer. I use this little heater for my 10 gallon quarantine tank. And kids love pushing all sorts of buttons. So far I like it setup was super easy. I have a 10gallon tank that was at 72 degrees.

  • Hygger Mini Inline Quartz Glass Aquarium Heater with External Controller, Adjustable Submersible Betta Fish Tank Thermostat 50W/100W
  • 【For Fish Tank 5-15 gallon】50W aquarium heater, voltage AC110-120V 60HZ, power cord is 4.6ft. Heater rod length is 5 inch, mini compact heater for small fish tank use. Perfect for betta tank. A very compact heater, easy to hide in the tank
  • 【Automatic Stop & Restart】Effectively maintain the tank water in the constant temp you set, stop heating when water temp reaches to the set temp and restart heating when the water temp is 1-2℉ below the set temp.The indicator light on the controller will be on red when it's heating, will be off when it stop heating
  • 【With Built-in Thermometer】you can set the the temp from 68℉ to 90℉,temp exactness is within 2 degrees in fahrenheit. There is a built-in thermometer in the heater to detect the water temp, not need to buy seperate thermometer
  • 【Durable Quartz Glass】this aquarium heater tube is heat-resistant quartz glass made, excellent in explosion-proof, can be used in fresh water and salt water aquariums, white alundum sand as the heat-conducting media, service life can be 3 years or more
  • 【Fully Submersible】this fish tank heater is waterproof, must be fully submerged in water when working, place it horizontally or vertically near the water intake or where the way of water flow
  • Manufacture: hygger
  • Editor's Impressions Of The hygger
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

hygger Final Thoughts

"Buy with confidence!"

Those turned out to be a hit and miss. When i installed them, i let them sit in the tanks without power for 6-24 hours. --The heater itself is a bit shorter if your tank is a short one. I bought a similar one at the pet store and it barely worked. But my guys don't read them and don't listen! I am very happy with this purchase. So when I first received it it didn't work and I was very disappointed.

Overall Score
4.4


(475 Points)

2. NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, UL Listed

User Ratings: 71 6

NICREW N11941 First Impressions

"Overall happy."

I will definitely be buying another one for my other tanks at bigger one. Just be careful and keep an eye on your temp settings when you have kids over! This heater is NOT fully submersible. The controller is easy to use, very accurate and reliable. I wouldn't buy any other heater, unless one of these stops working. The suction cups are large, high quality and seem to stick great. The temperature gauge is fairly accurate in my 55 gallon tank.

  • NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, UL Listed
  • Preset to 78°F - no adjustment required, which is the ideal temperature for most tropical fish
  • Automatic safety shut-off to avoid overheating
  • Indicator light allows simple visual confirmation of heater operation (red: heating up; off: temperature reached or unplugged)
  • Made from heat, shatter resistant quartz glass to allows for safe temperature control
  • Suitable for 3 - 10 gallon freshwater, marine and tropical aquariums
  • Manufacture: NICREW
  • Editor's Impressions Of The NICREW N11941
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

NICREW N11941 Final Thoughts

"9 degrees."

The temperatures are pretty accurate. Awesome chiller, perfect for Hydroponics. The heater is being used in a 40 gallon breeder. What more could you ask for great job Hygger Duncan. They shipped us the upgraded version that also heats! Come on Fluval, expect better from you. I like to keep it at 72 and from my thermometer it is reading at exactly 72.

Overall Score
4.4


(647 Points)

3. Fluval A767 Tronic Heater

User Ratings: 63 8

Fluval A767 First Impressions

"Very easy and accurate."

The temperature lights up so it's very easy to read. No biggie, but annoying nonetheless. Awesome chiller, perfect for Hydroponics. Awesome chiller, perfect for Hydroponics. The heater is easy; turn the dial to set temp and plug in. If the water runs low or air gets in the heater shuts off. I emailed the email it says to and told them.

  • Fluval A767 Tronic Heater
  • Fully submersible, easy to use electronic aquarium heater
  • Patented thermal sensor continuously samples water temperatures
  • Fast heat technology quickly achieves optimum temperature
  • Advanced circuitry for safe and reliable heating
  • 100-watt electronic heater, 13 inches long
  • Manufacture: Rolf C. Hagen (USA) Corp.
  • Product Dimensions: 12 x 4 x 7 inches; 11.2 Ounces
  • Editor's Impressions Of The Fluval A767
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Fluval A767 Final Thoughts

"I like this heater."

I noticed my old hygger heater beginning to fail and my wife ordered this one. The heater is super thin and the reflective surface is interesting. After several weeks of running the heater. Come on Fluval, expect better from you. Takes a little while to drop the temps if it is hot in the garage. We wish the controls were available in Farenheit also to make things a little easier. The heater is being used in a 40 gallon breeder.

Overall Score
4.2


(40 Points)

4. PERSUPER Submersible Aquarium Heater Adjustable LED Digital Temperature Display Fish Tank Heater for...

User Ratings: 62 12

PERSUPER First Impressions

"And I am glad I did."

I'm not a big fan of the big glass tubes. Am a totally sold customer and would recommend them to anybody! There is no protection from it banging on the glass tank. There is no protection from it banging on the glass tank. Keeps the temperature within 1 degree of what you set it to at all times. The temperature lights up so it's very easy to read. I had a thermometer on opposite side of tank and the heater was dead on true.

  • PERSUPER Submersible Aquarium Heater Adjustable LED Digital Temperature Display Fish Tank Heater for Turtle Betta Fish Water Heater with Protective Guard
  • Accurate temperature control: the intelligent IC chip is used for the aquarium heater. Press and hold the temperature control button for 3 seconds, switch between Fahrenheit and Celsius, and it is easy to control the temperature between 68 ° f / 20 ° C and 94 ° f / 34 ° C; this heater provides the best living environment for your aquatic organisms.
  • Safety assurance: it adopts the highest waterproof grade IP68, titanium pipe material, explosion-proof and anti-corrosion. When heating, it is more resistant to damage than the traditional glass heater, and has the function of overheating and water shortage protection. External temperature controller: touch the button controller to adjust the temperature without wetting your hands.
  • Automatic constant temperature function: when the water temperature reaches the specified temperature, the heater will automatically stop heating, when the water temperature is lower than the set temperature, the heater will automatically start heating.
  • Easy to use: submersible heaters are suitable for all types of aquariums; they are installed vertically or horizontally to ensure that the equipment is completely submerged. The heating rod shall be completely immersed in water and cannot be heated without water. Please unplug the power supply when cleaning the fish tank or replacing the water in the fish tank.
  • Wide compatibility: aquarium heater with CE, FCC and ROHS certification, plug with UL certification; suitable for fresh water and marine aquarium, aquaculture, glass containers and aquaculture system. 12 months warranty, 24-hour professional after-sales service.
  • Manufacture: PERSUPER
  • Editor's Impressions Of The PERSUPER
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

PERSUPER Final Thoughts

"I would buy again."

Thanks for the great customer service! --The cylinder or rod diameter is bigger. My marina heater takes a few hours. I'm in the process of setting up for tanks. Awesome chiller, perfect for Hydroponics. It's only been set up for a month we'll see how well it does in a few months. The heater is easy; turn the dial to set temp and plug in.

Overall Score
4.1


(190 Points)

5. U-picks Submersible Aquarium Heater 100W/300W/500W Fish Tank Heater with Intelligent External LED Di...

User Ratings: 70 11

U-picks First Impressions

"It easy to set."

We received the chiller promptly and put it into use. It's only been set up for a month we'll see how well it does in a few months. The controller is easy to use, very accurate and reliable. Once I opened the box i noticed the quality of the construction. Personally for me the housing doesn't bother me. If the water runs low or air gets in the heater shuts off. They shipped us the upgraded version that also heats!

  • U-picks Submersible Aquarium Heater 100W/300W/500W Fish Tank Heater with Intelligent External LED Digital Temperature Controller and Dual Temp Displays for Turtle Betta Fish Tank 5-130 Gallon
  • External Controller: Our fish tank heater is adjusted by an external controller, which you can mount on the outside edge of the tank. It’s convenient and safe to adjust temperature, no need to take the heater out from water and risk burning yourself.
  • Dual Temp Displays: With dual accurate LED digital temp displays, you can read & set the water temp 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!
  • Smart Heating: With the built-in temperature sensor and constant temperature heating system, this fish heater will start to work when the water temp is lower than set temp(red indicator), and stop work until the water temp reaches set temp(blue indicator). It can always provide adequate and steady water temperature for your beloved fish.
  • High Quality: Our fish tank heater is made of thicker quartz, which is shatter-proof and blast-proof. The heater cover is compact designed, which is heat resistant that will protect you little fish from scalding.
  • Tank Size: This 100W aquarium heater is suitable for 5-25 gallon fish tank both freshwater and saltwater. With our this fish tank heater, you can create a comfortable and safe environment for your fish.
  • Manufacture: U-picks
  • Editor's Impressions Of The U-picks
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

U-picks Final Thoughts

"Yes, you read that right."

I was worried about the quality but I am thoroughly impressed with this heater! I adjusted the set temperature a little lower to be more in the range I wanted. My fish likes to get close to it and he has never been hurt by it. Keeps the water consistent and it's easy to adjust! You program it for temperature you want your tank to be. My marina heater takes a few hours. Come on Fluval, expect better from you.

Overall Score
4.3


(111 Points)

6. FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermos...

User Ratings: 69 4

FEDOUR First Impressions

"Great heater."

The temperature lights up so it's very easy to read. I love the heater otherwise, but I'm afraid some water has gotten inside the heater. At this time I highly recommend this product. I tested it by unplugging and replugging it. Am a totally sold customer and would recommend them to anybody! Once attached to the tank wall I've had no issues with it coming off. If the blue light is flashing it means the heater is not fully submersible.

  • FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermostat for 5-40Gallon Fish and Turtle Tank
  • More Power and Longer Life: This heater is for 15-40 gallon fish tank, comparing to 100W, this 120W aquarium heater is more powerful and heating the same water in shorten time. Less working time provide longer life.
  • Double Safety Protection: 2mm thickened explosion-proof glass, 33% thicker than normal 1.5mm aquarium heaters, adding a specialized protective cover wrapping the heater tube, more durable and much safer for both human and aquatic creature.
  • Application: 120W suitable for15-40gallon fish tank, suitable for both fresh and marine water, suitable for all kinds of fish, turtle and plants. Size: 24cm in Length.
  • High-precision temperature control system, adjustable temperature ranges from 20°C - 34°C (68°F to 93°F).
  • Complete accessories: An additional stick-on thermometer as a bonus to detect water temp at any time, and an extra suction cup providing for spare. Offering 12 months warranty for the whole heater.
  • Install the suction cups on the heater according to the installation diagram.
  • Please pay more attention to the change of the water temperature during the first week.
  • Manufacture: IBAY
  • Editor's Impressions Of The FEDOUR
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

FEDOUR Final Thoughts

"The accuracy is perfect."

The heater is super thin and the reflective surface is interesting. Once attached to the tank wall I've had no issues with it coming off. It took me a few days slowly turning the dial up to finally get it where I wanted. I went ahead and went with the the larger 300W for my 45 gallon. The line is there due to regulations in certain countries. I confirm it with my cooking digital probe thermometer. I'm in the process of setting up for tanks.

Overall Score
4.4


(113 Points)

7. TOOSELL 500W Aquarium Heater with Intelligent LED Temperature Display and External Temperature Cont...

TOOSELL First Impressions

"Well written but vague."

This is only day one though, so I shall keep an eye one it. What more could you ask for great job Hygger Duncan. I have a 10gallon tank that was at 72 degrees. It just cycles through to 93f and starts over. I got this heater for my 55 gallon aquarium. The heater is super thin and the reflective surface is interesting. I got a hold of Amazon, who put me in touch with the seller.

  • TOOSELL 500W Aquarium Heater with Intelligent LED Temperature Display and External Temperature Controller, Fish Tank Heaters Auto Thermostat for Fresh Water, Marine Water, Aquaculture
  • PREMIUM MATERIALS:The aquarium heater made of durable titanium alloy tube is suitable for fresh water, salt water and other waters, durable and long service life.
  • SAFE TO USE & EASY TO OPERATE: First, after installing the aquarium heater and thermometer correctly, just set the required heating temperature, and the blue indicator light can ensure that the temperature is constant at the set point, because if there is water temperature, it Can automatically adjust the heating power variation, and ON/OFF switch and adjustable temperature controller.
  • EXQUISITE AND SMALL, DOES NOT TAKE UP SPACE: small size, easy to hide in the water tank, and with 2 suction cups, can stabilize the heater in the position of the water tank, and is suitable for 250-350L fish tanks.
  • The dual sensing probes on the top of the heater can provide more precise sensing. Through temperature control, there are indicators on the LED display to show the heating status. Long press the "Settings" key to switch between degrees Celsius and Fahrenheit. In addition, using a constant temperature controller, the temperature can be set from 68°F to 94°F, adjusted to a temperature suitable for fish, and the anti-scalding heater cover can prevent the fish from getting too close to the heater.
  • SATISFACTION GUARANTEE: If you are not satisfied with this order, please contact us via email. We will reply to you within 24h and offer you the best customer service.
  • Manufacture: Toosell
  • Editor's Impressions Of The TOOSELL
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

TOOSELL Final Thoughts

"Great product!"

Very easy to install and the adjustable temperature gauge is pretty accurate. This is a powerful heater that holds temperature very well. We wish the controls were available in Farenheit also to make things a little easier. They shipped us the upgraded version that also heats! Personally for me the housing doesn't bother me. I wouldn't buy any other heater, unless one of these stops working. Also were nice along the whole process.

Overall Score
4.0


(1 Points)

8. ISTA Micro Temperature Controller Thermostat 500W/1000W Heater Heating Aquarium Tank Globally

User Ratings: 39 29

Aquarium Equip I630_1000W ISTA First Impressions

"And I am glad I did."

My heater is fully submerged underwater and works perfectly fine. At this time I highly recommend this product. Would be great to be able to tune that to. I wouldn't buy any other heater, unless one of these stops working. I use a 50 for a 5 gal and a 10 gal tank. This is a great heater that is very easy to set up and program. The design is sleek and modern looking.

  • ISTA Micro Temperature Controller Thermostat 500W/1000W Heater Heating Aquarium Tank Globally
  • This Digital Temperature Controller is an excellent and convenient multifunction device for measuring and controlling temperature in Aquariums.
  • The stability of aquarium temperature is one of the crucial factors that contributes to the health and safety of your fish.
  • By utilizing the temperature controller, you can provide an environment with optimal temperature for your fish. This advanced temperature controller can measure and control temperature from 20 to 35 °C in Aquarium.
  • It has 3 power socket and maximum loading power is up to 1000 W. The controller set provides two Free500W Heating Rod ing Rod . The heating rod has over heating protection so it will automatic power off for heating rod when measured temperature reach 36 °C.
  • For aquarium in-door use only.
  • Manufacture: ISTA
  • Product Dimensions: 12.09 x 7.2 x 5 inches; 2.09 Pounds
  • Editor's Impressions Of The Aquarium Equip I630_1000W ISTA
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Aquarium Equip I630_1000W ISTA Final Thoughts

"Works great."

This is a great heater that is very easy to set up and program. Beware, but we are hoping for a good outcome! Also I like how it shows both the current temperature and the set temperature. I recieved this product without the instructions or the added thermometer. Temperature is slightly off by running a little warmer. This little heater is perfect; this is our third purchase of the same heater. The line is there due to regulations in certain countries.

Overall Score
3.2


(46 Points)

9. hygger Submersible Aquarium Heater, Adjustable Fish Tank Heater Compact Reliable Betta Heater, Heat-...

User Ratings: 63 11

hygger First Impressions

"That wasn't a good sign."

We wish the controls were available in Farenheit also to make things a little easier. After several weeks of running the heater. Come on Fluval, expect better from you. It just cycles through to 93f and starts over. I adjusted the set temperature a little lower to be more in the range I wanted. I appreciate the exterior temp readout and control module. Just be careful and keep an eye on your temp settings when you have kids over!

  • hygger Submersible Aquarium Heater, Adjustable Fish Tank Heater Compact Reliable Betta Heater, Heat-Resistant Milky Quartz Made, with External Temp Controller, 100W/300W, 10-60 Gallon
  • 【For Fish Tank 30-60 gallon】300W aquarium heater, voltage 110-120V, power cord is 5.4ft, please choose the right wattage aquarium heater according to our size chart. Don't suggest use this heater in sump or a tank with turtles in
  • 【Reliable & Safty Protection】automatically shut off when fault occurs. Effectively maintain the tank water in the constant temp you set, stop heating when the water temp is 1.5-2℉ above the set temp and restart heating when the water temp is 1.5-2℉ below the set temp
  • 【Temp adjustable】with external temp controller, set the temp to one of these values you can see on the dial: 75, 77, 79, 81, 83, 85, 87, 89, 91 by rotating the pointer, the heater will not work if you set the temp to other degrees between those values. Temp exactness is within 2 degrees in fahrenheit. There is a built-in thermometer in the heater to detect the water temp
  • 【Durable & Compact】this aquarium heater tube is heat-resistant milky quartz made, excellent in explosion-proof, can be used in fresh water and salt water aquariums, white alundum sand as the heat-conducting media, service life can be 3 years or more. A very compact heater, easy to hide in the tank
  • 【Fully Submersible】this fish tank heater is waterproof, must be fully submerged in water when working, stick it horizontally onto the tank side near the water intake or where the way of water flow
  • Voltage: 100-120V
  • Frequency: 60HZ
  • Manufacture: hygger
  • Editor's Impressions Of The hygger
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

hygger Final Thoughts

"9 degrees."

The line is there due to regulations in certain countries. I left seller feedback yesterday but have yet to hear from the seller. Easy to read the temp and know exactly how warm the water is. It's only been set up for a month we'll see how well it does in a few months. Those turned out to be a hit and miss. I tested it by unplugging and replugging it. I dont know, and havent tried just yet.

Overall Score
4.1


(569 Points)

10. HITOP 50W 100W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Thermom...

User Ratings: 61 10

HITOP HP 608 First Impressions

"Until the next time."

Easy to read the temp and know exactly how warm the water is. I had a thermometer on opposite side of tank and the heater was dead on true. I noticed my old hygger heater beginning to fail and my wife ordered this one. It is a bonus that the heater is titanium. The heater is being used in a 40 gallon breeder. This is only day one though, so I shall keep an eye one it. I tested it by unplugging and replugging it.

  • HITOP 50W 100W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Thermometer
  • Thickened Glass: 2mm thickened quartz glass, 33% thicker than 1.5mm normal aquarium heaters, much safer for human and your lovely fishes, your pets will no longer fear the winter.
  • Automatic Constant Temperature Function: this fish heater, adjustable temperature 68 ~ 93 °F, will shut off automatically when the temperature is reached, no extra adjustment is required.
  • Quick and easy installation, submersible fish tank heater, vertical or horizontal placement using suction cups. 1 extra powerful suction cups as your backup (total 3).
  • 300W aquarium heater, length 11-inch, power cord 4.9ft, recommended for aquariums 30 to 60 Gallons.
  • Bonus a stick-on thermometer, no need to buy another thermometer, 24-Hour Professional After-sales Service.
  • Manufacture: Haisen
  • Editor's Impressions Of The HITOP HP 608
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

HITOP HP 608 Final Thoughts

"7L Imagitarium tank."

This product came in the nick of time! Bought it as a chiller for the k40 CO2 laser. If the blue light is flashing it means the heater is not fully submersible. If the water runs low or air gets in the heater shuts off. --The cylinder or rod diameter is bigger. I think it works well to not stand out like other heaters. You don't have to worry about wide temperature swings with this unit.

Overall Score
4.2


(87 Points)

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