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 [star rating='5']
• Quality [star rating='4.3']
• Value For Money [star rating='4.3']
• Affordability [star rating='5']

Here Are Some Other Related Aquarium Heaters

2. Uniclife Preset Aquarium Heater Submersible 50W/250 W with Electronic Thermostat Fish Tank Heater fo...

User Ratings: 66 12

Uniclife First Impressions

"I do recommend."

It does blend well in some setups and may look bulky in others. I confirm it with my cooking digital probe thermometer. I would definitely recommend this product. I will definitely be buying another one for my other tanks at bigger one. I hope these suction cups work very well. The temperatures are pretty accurate. If the water runs low or air gets in the heater shuts off.

• Uniclife Preset Aquarium Heater Submersible 50W/250 W with Electronic Thermostat Fish Tank Heater for 10/80 Gallon
• 5~15 gallons fish tanks were recommended. Applicable for freshwater, marine and tropical aquariums.
• Preset temperature of 78°F: Built-in electronic thermostat, Model PH50 would automatic heating water then maintain the temperature at 78±2° which is an ideal temperature for most of tropical fish. No adjustment needed, so not adjustable, please kindly note before order.
• Shut-off Automatically: LED indicator light would display red while it’s turned on and heating, will automatic turn off when the preset temperature( 78±2°) was reached.
• Anti-Shatter：Made of heat-resist thick quartz glass, shatterproof material to keep your fishes safe. UL listed, prevent the risk of fire, electric shock.
• Small Sized and Submersible: Fully submerge the heater, tightly fix it with 2 strong suction cups vertically or horizontally on the tank. Small size makes it easy to hide and save space.
• To keep the water at the right temperature of 78 degree F consistently for the most popular tropical fish species.
• The temperature won’t change suddenly or frequently would make your fish happy and healthy.
• Made of a shatter-resistant tempered quartz glass, which helps to keep your fish and other aquarium dwellers safe.
• Manufacture: Uniclife

• Editor's Impressions Of The Uniclife
• Heat Quality [star rating='4.8']
• Quality [star rating='3.6']
• Value For Money [star rating='5']
• Affordability [star rating='4.4']

3. Aquarium Heater 500W/800W/1000W/1200W, Double Heating Tubes, Fast Heating and Power Saving, External...

User Ratings: 55 36

TINTOR First Impressions

"Looks as advertised."

This has been in my fish tank for a few months now and it's been absolutely perfect! Maintains it well except when the weather is already warm then it over heats it. I was worried about the quality but I am thoroughly impressed with this heater! Product was received fast, works excellent! It is safe and dependable and comes with a one year warranty. Easy enough to let it run all the time. This heater is NOT fully submersible.

• Aquarium Heater 500W/800W/1000W/1200W, Double Heating Tubes, Fast Heating and Power Saving, External Digital Temp Controller, Used for 50-160 Gallon Fresh/Salt Water Fish Tanks
• 【PRECISE TEMPERATURE CONTROL】The built-in PID chip realizes rapid heating, smart constant temperature, stability and precision, temperature setting range is 68~93ºF and the temperature difference is within ±1ºF. The heater provides a comfortable living environment for your aquatic creatures
• 【SAFE AND DURABLE】Explosion-proof quartz tube, special safety design for auto shut off when overheating or not fully submerged. The heater provides a super safe living environment for your fish.
• 【REALTIME TEMPERATURE DISPLAY】The LED digital display controller displays the real-time water temperature and set temperature, so you can keep track of the fish tank temperature at any time.
• 【HIGH-QUALITY MATERIAL】ABS plastic integral molding, no deformation, no softening, explosion-proof and anti-corrosion, no pollution, high insulation strength, suitable for both fresh water and sea water. The double-row suction cup bracket can stably fix the heater on any corner of the fish tank
• 【Four Size Available】500W(50-80 gal), 800W(80-105 Gal), 1000W(105-130 Gal), 1200W(130-160 Gal).
• Manufacture: TINTOR

• Editor's Impressions Of The TINTOR
• Heat Quality [star rating='4.2']
• Quality [star rating='3']
• Value For Money [star rating='3.8']
• Affordability [star rating='3.8']

4. Aqueon Pro Adjustable Heater, 100W

User Ratings: 69 11

Aqueon 100106106 First Impressions

"I have a 5."

You don't have to worry about wide temperature swings with this unit. I have it set to 81F to get a 77F water temp. The heater protector was very heavy plastic and slim lined which is great. Also were nice along the whole process. The temperature has been holding all day, even in a colder room. Well I bought a second one took me only one trying to get the right temperature. I contacted the manufacturer and they sent me a new unit in less than a week!

• Aqueon Pro Adjustable Heater, 100W
• Adjustable heat setting 68 to 88°F, Electronic Thermostat accurate to +/- 1°
• Shatterproof and nearly indestructible
• Fully submersible; Auto Shut-Off when over-heats, resets when it cools down
• LED light is always on: red when heating, green when not heating
• Limited Lifetime warranty
• Manufacture: Aqueon
• Item Weight: 9.6 ounces
• Product Dimensions: 4 x 14 x 2 inches

• Editor's Impressions Of The Aqueon 100106106
• Heat Quality [star rating='4.2']
• Quality [star rating='5']
• Value For Money [star rating='3.4']
• Affordability [star rating='4.5']

5. BoTaiDaHong 35L Aquarium Fish Tank Shrimp Water Chiller 10-40℃ Temperature Heater Cooler Set LCD D...

BoTaiDaHong First Impressions

"No issues."

Would be great to be able to tune that to. Keeps the temperature within 1 degree of what you set it to at all times. I got this heater for my 55 gallon aquarium. You don't have to worry about wide temperature swings with this unit. I adjusted the set temperature a little lower to be more in the range I wanted. I wouldn't buy any other heater, unless one of these stops working. They promptly fixed the issue without any delays or drama.

• BoTaiDaHong 35L Aquarium Fish Tank Shrimp Water Chiller 10-40℃ Temperature Heater Cooler Set LCD Display AC 110V Adjustable Temperature Aquarium Tool 100W Fish Tank Cooling
• 【Specification】Circulating Water Pump Flow: 1-3L/Min Suitable Range: Max.pump lift ＜3M Voltage: 110V Power: 100W Cooling Water Capacity: ≤ 35L Inner Size of Hose: 8mm
• 【Save energy】The fish tank water cooler adopts micro computer and semiconductor for cooling, high efficient and low power consumption.
• 【Application】Used with water pump and hose. Suitable for all kinds of cold water tanks.
• 【Package included】1 X Power Adapter 1 X Power Line 2 X Hose Buckles 1 X Aquarium Water Chiller 1 X 2M Length Hose 1 X Water Pump
• 【Shipment】We ship directly from the US warehouse.about 5-7 business days to delivery. We have a Professional Customer Service Team to Reply You within 24 hours.If you have any questions or concerns, Feel free to contact us!We will always stand behind our products and will provide the best suitable solutions for you
• Manufacture: BoTaiDaHong

• Editor's Impressions Of The BoTaiDaHong
• Heat Quality [star rating='5']
• Quality [star rating='4.9']
• Value For Money [star rating='5']
• Affordability [star rating='4']

6. K&H Pet Products Perfect Bucket Heater w/ Cord Clip Gray 5" 80W

User Ratings: 74 9

K&H PET PRODUCTS 100213458 First Impressions

"Problem solved."

Now, both points are clear on the package instructions. We would consider a replacement and then we would return the defective unit. My fish likes to get close to it and he has never been hurt by it. 210 gallon ones and one 90 gallon bow front tank. I'm in the process of setting up for tanks. It is safe and dependable and comes with a one year warranty. It's pretty noticeable, but I don't really care.

• K&H Pet Products Perfect Bucket Heater w/ Cord Clip Gray 5" 80W
• Safely Maintains open water to -20 Degree
• Durable Enamel finish is easy to clean
• Thermostatically controlled, using Only 80 watts
• Free cord safety clip included
• This K&H deicer has been tested & certified by MET Labs to exceed USA/CA electrical safety standards
• Manufacture: Central Garden & Pet
• Product Dimensions: 8.15 x 5.6 x 2.35 inches; 1.11 Pounds

• Editor's Impressions Of The K&H PET PRODUCTS 100213458
• Heat Quality [star rating='5']
• Quality [star rating='4.1']
• Value For Money [star rating='3.6']
• Affordability [star rating='4.7']

7. Zacro Aquarium Heater, 100W Submersible Digital Display Mini Fish Tank Heater with Intelligent LED T...

User Ratings: 67 6

Zacro First Impressions

"That was cool."

I confirm it with my cooking digital probe thermometer. The suction cups are large, high quality and seem to stick great. I went ahead and went with the the larger 300W for my 45 gallon. We received the chiller promptly and put it into use. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. I use this little heater for my 10 gallon quarantine tank. I will definitely be buying another one for my other tanks at bigger one.

• Zacro Aquarium Heater, 100W Submersible Digital Display Mini Fish Tank Heater with Intelligent LED Temperature Display and External Temperature Controller, for 10-20gal Fish Tank
• INTELLIGENT TEMPERATURE CONTROL: An intelligent IC chip controls the heater temperature, making the temperature difference within ±2ºF. 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. Provide the best living environment for your aquatic creatures.
• DIGITAL DISPLAY&REMOTE CONTROLLER: Digital LED display shows real time water temperature. Heating temperature range from 68 to 91°F. The remote-button controller adjusts the temperature without getting your hands wet.
• AUTOMATIC OVERHEATING PROTECTION: Once set the desired temperature, this fully submersible heater lights on red indicates that it is heating. It will auto shut off once it reach set temperature. If the heating rod temperature reaches 96.8°F (36°C), the heating rod will stop heating. The thermometer can observe the water temperature at any time.
• SHUT OFF WHEN OUT OF WATER: Please note that this a fully submersible aquarium heater for fresh water and saltwater tank, when the top part of the heater is out of water it will auto shut off and the led displaying Er. The product uses explosion-proof quartz tube and is equipped with a plastic anti-collision sheath to prevent your aquatic organisms from being injured by touching the heating rod.
• Our heating rods can be used continuously for up to 10,000 hours and can display the use time. Let you replace the heating rod in time to ensure the continuous water temperature.
• Keep the heater fully submerged in water.
• Don’t bury the heater under substrates such as gravels or sands.
• Keep the remote temp controller away form water.
• Manufacture: Zacro

• Editor's Impressions Of The Zacro
• Heat Quality [star rating='3.6']
• Quality [star rating='4.9']
• Value For Money [star rating='3.6']
• Affordability [star rating='3.6']

8. Uniclife 100 Watt Aquarium Heater with Thermometer, Fish Tanks Heater of 20 Gallon

User Ratings: 77

Uniclife First Impressions

"What a long."

They promptly fixed the issue without any delays or drama. This has the best controller that I have found on the market. Once attached to the tank wall I've had no issues with it coming off. I was amazed how quickly I got to my temperature I need it 78 degrees. Easy to read the temp and know exactly how warm the water is. But I am single and don't have to worry about this. I left seller feedback yesterday but have yet to hear from the seller.

• Uniclife 100 Watt Aquarium Heater with Thermometer, Fish Tanks Heater of 20 Gallon
• Can be used in both freshwater and saltwater, applicable for 10~25 gallon fish tanks.
• Adjust temperature by top red knob, range 68°F-93°F. Tube temperature displayed.
• Water-tight of IP68 sealing. 2mm shatterproof quartz housing, bottom clash-proof cover. (NOTICE: Can’t be used even just cracked a tiny bit, pls contact us for replacement)
• Measurement 9.7" x 1" (L x D). Only allowing for vertical or horizontal installment.
• Package include aquarium heater x 1; Suction Cups x 3; stick-on thermometer x 1.
• By rotating the Red knob at the top you can simply set the temperature from 68 - 93°F.
• The red indicator light on while heating, automatic shut-off when reach the temp.
• The aquarium glass submersible heater must be fully immersed.
• Manufacture: Uniclife

• Editor's Impressions Of The Uniclife
• Heat Quality [star rating='4.4']
• Quality [star rating='4.2']
• Value For Money [star rating='5']
• Affordability [star rating='4.6']

9. 300w 150w 50w Submersible Aquarium Heater Auto Thermostat Heater with Suction,LED Small Mini Tempera...

User Ratings: 59 16

FTSTC First Impressions

"One word of caution."

The temperature gauge is fairly accurate in my 55 gallon tank. 210 gallon ones and one 90 gallon bow front tank. I got the 200W variant for my 54 gallon corner tank that's housing goldfish. I had a thermometer on opposite side of tank and the heater was dead on true. This is a powerful heater that holds temperature very well. Keeps the water consistent and it's easy to adjust! I confirm it with my cooking digital probe thermometer.

• 300w 150w 50w Submersible Aquarium Heater Auto Thermostat Heater with Suction,LED Small Mini Temperature Display Aquarium Fish Tank Heater for Fish Tank Water
• UPGRADED MORE DURABLE VERSION: Provided the best warm area to your fish in the cold winter.Keeps improving best aquarium heater for your fish tank, after collecting so many comments from customers, we upgrade its function and life time, now it works more continuously and accurately.
• MORE SAFETY & HIGH QUALITY: This upgraded aquarium heater now updated for more durable Quartz Glass, which is pretty shatter-proof and blast-proof and prevents electricity leakage. And the stronger protective container updated for Anti-melting anti punching double sealed material, it is scald-preventing for your pets and your safety.
• FREE THERMOMETER: This fish tank heater come with an extra thermometer to show the accurate tank temperature to avoid overheat or freeze. It provide a constant warm environment for your pet fish to stay healthy, suitable both for fresh and salt water.
• TEMPERATURE CONTROL: Aquarium heater works in intermittent operation mode and will automatically turn on/off to achieve the setting temperature constantly and stably. Setting the temperature by the red knob on the top with range is 64°F - 94°F.High accuracy(±1°F)
• APPLICABLE TANK SIZE: Our submersible aquarium heaters are perfect designed for different size tank, 50W for 5-10 gallon; 100W for 10-30 gallon; 300W for 30-85 gallon, please choose the suitable power for your tank. And we also recommend to position it near a strong water flow, the outlet of a power filter is ideal, so that the whole aquarium are in the same temperature.
• Manufacture: FTSTC
• Batteries: 1 LR44 batteries required. (included)

• Editor's Impressions Of The FTSTC
• Heat Quality [star rating='4.5']
• Quality [star rating='4.5']
• Value For Money [star rating='4.8']
• Affordability [star rating='3.3']

10. 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 [star rating='4.1']
• Quality [star rating='3.2']
• Value For Money [star rating='4.1']
• Affordability [star rating='4.1']