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. ZHFEISY 300w Aquarium Fish Tank Cooler Electronic Water Chiller Cooling Machine 100L

User Ratings: 54 46

ZHFEISY First Impressions

"5 stars in my book!"

But my guys don't read them and don't listen! I emailed the email it says to and told them. Personally for me the housing doesn't bother me. For Discus you need warm and accurate heater and this seems to do the trick. I dont know, and havent tried just yet. It would stick out of my 30 g wide tank if I were to put it vertical. The red light means it's off, blue light means the temperature is constant.

  • ZHFEISY 300w Aquarium Fish Tank Cooler Electronic Water Chiller Cooling Machine 100L
  • 【Product Parameters】 Working voltage: AC110V /60HZ; Machine power: 300W; Take-over specifications: 8MM hose; Temperature probe length: 1.2M;
  • 【Features】1. Real-time temperature display, simple operation setting; 2, Automatic temperature control and energy saving, start cold quickly (<5 seconds)
  • 【Connection】An external pump is required to pump water or directly in series with the flow pipe.
  • 【Application】Applicable to seawater, fresh water and medium and low acid and alkaline environment.
  • 【1-Year Warranty】If you need refund/return or have any questions, plz feel free to contact us.
  • Manufacture: ZHFEISY
  • Editor's Impressions Of The ZHFEISY
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

ZHFEISY Final Thoughts

"Pricing was good."

I appreciate the exterior temp readout and control module. There is no protection from it banging on the glass tank. This heater is NOT fully submersible. I wouldn't buy any other heater, unless one of these stops working. Now, both points are clear on the package instructions. Maintains it well except when the weather is already warm then it over heats it. It would stick out of my 30 g wide tank if I were to put it vertical.

Overall Score
3.2


(2 Points)

3. hygger 500 Watt Aquarium Heater with LED Digital Temperature Controller, Submersible Fish Tank Heate...

User Ratings: 65 11

hygger HG-925 First Impressions

"Perfect heater for my 2."

I am very happy with this purchase. I am very happy with this purchase. I emailed the email it says to and told them. I am very happy with this purchase. No biggie, but annoying nonetheless. When i installed them, i let them sit in the tanks without power for 6-24 hours. But my guys don't read them and don't listen!

  • hygger 500 Watt Aquarium Heater with LED Digital Temperature Controller, Submersible Fish Tank Heater for 60-120 Gallon
  • This fully submersible aquarium heater enables memory function and over heat protection. Auto shut off when over-heats, resets when it cools down
  • Made with premium quartz and double sealed by black protective guard, this fish tank heater is resistant to corrosion, and protect fish and other livestocks from punching and scalding
  • Build-in external IC temp controller, easy to read blue LED digital number shows real time water temperature. Heat indicator lights on red when fish heater start to heat and turns in yellow once it reach set temperature. Temp accuracy is +/- 1°F
  • Easy to set temperature without getting hands wet. Temperature can be precisely adjusted from 61 to 90°F (16°C ~ 32°C). Just press set button to desired temperature, it blinks 3 seconds and begins to work
  • 500 watt aquarium heater, voltage 110-120V, suitable for tank capactiy 60-120 gallon freshwater and saltwater aquariums
  • IP68 100% Waterproof, Fully Submersible
  • Dual Protection - Durable Quartz Tube, resistant to corrosion; Double sealed material and protective container for scald preventing and anti punching Accurate temperature control from 61°F to 90°F (16°C ~ 32°C)
  • Easy to read blue LED digital display shows water temperature
  • Manufacture: hygger
  • Editor's Impressions Of The hygger HG-925
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

hygger HG-925 Final Thoughts

"Highly recommended."

I had a thermometer on opposite side of tank and the heater was dead on true. No biggie, but annoying nonetheless. You program it for temperature you want your tank to be. Sometimes it gets outside of it's ability to cool but only within a few degrees. Two inches above that is a waterline for maximum. I recieved this product without the instructions or the added thermometer. This product came in the nick of time!

Overall Score
4.2


(76 Points)

4. 300 Watt Aquarium Heater Fast Heating Titanium Tube Saltwater Fully Submersible Fish Tank Heaters wi...

Periha HF-300W First Impressions

"Highly recommended."

Per my thermometers, they are all staying constant. It's pretty noticeable, but I don't really care. Just be careful and keep an eye on your temp settings when you have kids over! This product came in the nick of time! They shipped us the upgraded version that also heats! Was very impressed with the quality of this heater. There is no protection from it banging on the glass tank.

  • 300 Watt Aquarium Heater Fast Heating Titanium Tube Saltwater Fully Submersible Fish Tank Heaters with LED Digital Temperature External Controller Freshwater Safety Pinpoint Thermostat 53-80 Gallon
  • ✅ STRONG ANTI-CORROSION: The tank heater is made of high-quality, durable titanium alloy, no glass, do not worry, it will be shattered. And its strong anti-corrosion features make it perfect for freshwater, saltwater aquariums, and reef tanks.
  • ✅ SAFE EXTERNAL CONTROL: With external thermostat, no need to take out the heater from the aquarium or tank, easily adjust the temperature you want without getting your hands wet, prevent electric shock & burns, keep you and your family safe.
  • ✅ ACCURATE TEMP CONTROL: LCD display can clearly show the temperature setting in either Celsius or Fahrenheit, just press and hold the “SET” button for 3-4s. Heating temperature ranges from 68 to 93°F(14-34℃). Control accuracy is +/- 0.5° C, providing a constant warm aquarium for your pet fish to stay healthy.
  • ✅ EASY TO SETUP & USE: This heater is fully submersible in water HORIZONTALLY with 2 strong suction cups, not easy to move and drop off, preventing your pets from harm and burning. Place it near a strong water flow to keep the whole tank at the same temperature.
  • ✅ AQUARIUM CAPACITY: 300W stable output power, the heater fits for aquariums with 53-80gallons(300 Liters) of water capacity. We offer a 1-year limited warranty, if you have any questions, pls contact us first, we will respond within 24 hours to solve the problem.
  • Manufacture: Periha
  • Product Dimensions: 11.23 x 0.75 x 0.2 inches; 1.15 Pounds
  • Editor's Impressions Of The Periha HF-300W
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Periha HF-300W Final Thoughts

"Love these slim heaters!"

This is only day one though, so I shall keep an eye one it. I waited a little bit to write the review so it could be accurate. I got a hold of Amazon, who put me in touch with the seller. The temperatures are pretty accurate. I am very happy with this purchase. My marina heater takes a few hours. --Temperature adjustment labeling is on top rather than on the rod.

Overall Score
5.0


(9 Points)

5. DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

User Ratings: 75 7

DaToo First Impressions

"Very easy and accurate."

I have only had minor problems with the suction cups. I was worried about the quality but I am thoroughly impressed with this heater! You don't have to worry about wide temperature swings with this unit. The design is sleek and modern looking. I got this heater for my 55 gallon aquarium. This heater works, but the dial it isn't very accurate. No biggie, but annoying nonetheless.

  • DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker
  • 25W Betta Aquarium Heater -- Creating and maintaining a perfect and comfortable water temperature for our cute fish is not easy, which requires a lot of effort. Now DaToo MINI 25W Aquarium Heater can help you make this easier. Precise and constant temperature, no need to set, keep the temperature of fish habitat in the best state at all times. You will find it very easy and happy to take care of pet fish!
  • Precise And Constant Temperature -- No need to set, DaToo Fish Tank Heater will automatically keep the water temperature of the fish habitat at 78℉. This temperature is very suitable for betta and most tropical fish. When the water temperature is lower than 78℉, the heater starts to heat and the red light is on. When the temperature reaches 78℉, the heater stops heating and the green light is on. DaToo will always maintain this comfortable temperature for your beloved fish!
  • The Smallest 25W Betta Heater -- For most fish lovers who have small fish tanks of 1 to 5 gallons, a small heater means more space for fish. This is the smallest 25W aquarium heater on the market, only 0.2 inches. No matter how small your fish tank is, it can be used perfectly in it, and you can't even find it. Very MINI!!
  • Safe And Durable -- Unlike traditional plastic seals, DaToo uses a rubber sealing layer, which ensures that DaToo has better sealing and safety performance, and will never leak electricity or water. Quartz glass material, explosion-proof and crack-proof, more sturdy and durable, without worrying about damage.
  • One Year Warranty & Satisfaction Guarantee -- This heater is ideal for 1 to 6 gallon small glass or acrylic desktop aquariums. When in use, it needs to be submerged 100% in water. We provide one year warranty and 24 hours professional customer service. Buy With Confidence!
  • Manufacture: DaToo
  • Editor's Impressions Of The DaToo
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

DaToo Final Thoughts

"Great product!"

I use a 50 for a 5 gal and a 10 gal tank. It took about an hour to reach 80f, which is fairly quick. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. This does a great job at regulating the temp in my 10 gallon. I wouldn't buy any other heater, unless one of these stops working. It took me a few days slowly turning the dial up to finally get it where I wanted. I recieved this product without the instructions or the added thermometer.

Overall Score
4.4


(185 Points)

6. Sheye 500W Aquarium Heater, Fast Heating Submersible Thermostat, Titanium Fish Tank Heater, with LED...

User Ratings: 65

Sheye First Impressions

"Great heater."

It took me only two tries to get it to the correct temperature. The setting always stayed the same. But I am single and don't have to worry about this. It took me only two tries to get it to the correct temperature. They promptly fixed the issue without any delays or drama. Also I like how it shows both the current temperature and the set temperature. The heater protector was very heavy plastic and slim lined which is great.

  • Sheye 500W Aquarium Heater, Fast Heating Submersible Thermostat, Titanium Fish Tank Heater, with LED Digital Display and External Temperature Controller, for Salt/Fresh Water
  • [Safe & Reliable]: Accurate temperature control making the temperature difference within ±1℃/±2ºF; automatically shut-off the power to avoid overheating and damage, keeping your fish healthy.
  • [Rapid Heating]: Aquarium heaters is made of high quality Titanium metal, high heat transfer efficiency and short heating time. 500 watts is ideal for large aquariums of 60-150 gallons.
  • [Easy Installation]: Vertical or horizontal installation and ensure the device is fully submerged underwater.
  • [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.
  • [Wide Compatibility]: The fish tank aquarium heater applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems.
  • Manufacture: Sheye
  • Editor's Impressions Of The Sheye
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Sheye Final Thoughts

"The FreeSea is amazing."

Very easy to install and the adjustable temperature gauge is pretty accurate. The temperature gauge is fairly accurate in my 55 gallon tank. I like the fact that it comes with a digital thermometer. Thanks for the great customer service! It does blend well in some setups and may look bulky in others. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. So far I like it setup was super easy.

Overall Score
4.7


(9 Points)

7. AquaTop Submersible Glass Heater (200 Watt (Up to 50 Gallons))

User Ratings: 80 10

AquaTop 10 First Impressions

"No copper lines!"

I used to try those other cheap heaters sold on amazon. No biggie, but annoying nonetheless. It is a bonus that the heater is titanium. My heater is fully submerged underwater and works perfectly fine. The heater is easy; turn the dial to set temp and plug in. --The heater itself is a bit shorter if your tank is a short one. There is no protection from it banging on the glass tank.

  • AquaTop Submersible Glass Heater (200 Watt (Up to 50 Gallons))
  • Manufacture: Aquatop
  • Product Dimensions: 10 x 0.01 x 10 inches; 0.16 Ounces
  • Editor's Impressions Of The AquaTop 10
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

AquaTop 10 Final Thoughts

"This is a quality heater."

Checked the accuracy of the heater with an infrared thermometer. Two inches above that is a waterline for maximum. I use this little heater for my 10 gallon quarantine tank. You program it for temperature you want your tank to be. This is a powerful heater that holds temperature very well. It just cycles through to 93f and starts over. I will definitely be buying another one for my other tanks at bigger one.

Overall Score
4.5


(15 Points)

8. JZMYXA Aquarium Heater Clip Holder Aquarium Tube Clip Suction Cup Clip, 4 Pieces

User Ratings: 60 15

JZMYXA First Impressions

"My fish is very content."

I was amazed how quickly I got to my temperature I need it 78 degrees. I confirm it with my cooking digital probe thermometer. The temperature lights up so it's very easy to read. This has the best controller that I have found on the market. The temperature lights up so it's very easy to read. When i installed them, i let them sit in the tanks without power for 6-24 hours. I think it works well to not stand out like other heaters.

  • JZMYXA Aquarium Heater Clip Holder Aquarium Tube Clip Suction Cup Clip, 4 Pieces
  • 4 pieces. Leaf shape tube clamp.
  • Clip inner diam:0.69 inch(17.6mm).
  • Fit for pipe Outer diam between 0.7-1 inch(18-24 mm).
  • Fit for aquarium heater diam between 0.7-1 inch(18-24 mm).
  • High quality and durable.
  • Manufacture: JZMYXA
  • Product Dimensions: 1.14 x 1.57 x 0.39 inches; 0.81 Ounces
  • Editor's Impressions Of The JZMYXA
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

JZMYXA Final Thoughts

"Very pleased so far."

Keeps the water consistent and it's easy to adjust! We wish the controls were available in Farenheit also to make things a little easier. We would consider a replacement and then we would return the defective unit. If the blue light is flashing it means the heater is not fully submersible. I would definitely recommend this product. Per my thermometers, they are all staying constant. I'm in the process of setting up for tanks.

Overall Score
4.0


(74 Points)

9. Marineland Precision Heater for Saltwater or Freshwater Aquariums

User Ratings: 64 17

MarineLand ML90652 First Impressions

"There was only~0."

No biggie, but annoying nonetheless. My heater is fully submerged underwater and works perfectly fine. The controller is easy to use, very accurate and reliable. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees. Easy enough to let it run all the time. I waited a little bit to write the review so it could be accurate. I have had to turn the dial to about 78-79 for the tank to stay around 76 degrees.

  • Marineland Precision Heater for Saltwater or Freshwater Aquariums
  • This 200 watt heater is for aquariums up to 55 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.
  • Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.
  • The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability
  • Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
  • Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location.
  • Manufacture: Marineland
  • Product Dimensions: 3.94 x 1.63 x 14.81 inches; 10.4 Ounces
  • Editor's Impressions Of The MarineLand ML90652
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

MarineLand ML90652 Final Thoughts

"I like the size."

Once I opened the box i noticed the quality of the construction. The red light means it's off, blue light means the temperature is constant. My fish likes to get close to it and he has never been hurt by it. My fish likes to get close to it and he has never been hurt by it. They shipped us the upgraded version that also heats! Ick for instance detaches from fish at 86 degrees and dies at 89. Also I like how it shows both the current temperature and the set temperature.

Overall Score
4.0


(1306 Points)

10. PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks

User Ratings: 75 7

PULACO PL-168 First Impressions

"5 gallon tank."

I would definitely recommend this product. It just cycles through to 93f and starts over. The setting always stayed the same. The suction cups are large, high quality and seem to stick great. I like to keep it at 72 and from my thermometer it is reading at exactly 72. Keeps the temperature within 1 degree of what you set it to at all times. I am very happy with this purchase.

  • PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks
  • ★【Betta Heater】This Fish Tank Heater should be 100% submerged into water, Ideal for small glass or acrylic desktop aquariums up 1 to 6 Gallons, not suitable for less than 1 gallon tank.
  • ★【Quick and Easy Installation】:Vertical or horizontal placement using, Aquarium heater automatic temperature control 78℉, no need to adjust temperature, easy to operate, fishes happy.
  • ★【How it Works】: Plug in, red light turns on, the heater will start working until water temperature up to 78°F, and red light off, then the green light will turn on, heater stop working and keeping constant temperature 78°F. Accuracy:±3°F
  • ★【Note】: Do not operate or leave product plugged in when it is outside of water, Children should be use this heater under adult's guidance.
  • ★【SATISFACTION GUARANTEED】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.
  • Please install and use this heater under rated voltage conditions(110V-120V/60Hz).
  • This heater is designed for small fresh/sea water tanks, please do not use it in chemical water or any other heating purpose, it may damage the heater.
  • Children should be use this heater under adult's guidance.
  • Manufacture: PULACO
  • Product Dimensions: 5.5 x 1.2 x 2.7 inches; 4.48 Ounces
  • Editor's Impressions Of The PULACO PL-168
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

PULACO PL-168 Final Thoughts

"I would call that a win."

It took me a few days slowly turning the dial up to finally get it where I wanted. I have it set to 81F to get a 77F water temp. Checked the accuracy of the heater with an infrared thermometer. You program it for temperature you want your tank to be. Temperature is slightly off by running a little warmer. The heater is easy; turn the dial to set temp and plug in. The suction cups are large, high quality and seem to stick great.

Overall Score
4.5


(1130 Points)

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