Editor's Choice - Our Favorite Cheap Aquarium Heaters

1. Cobalt Aquatics Flat Neo-Therm Heater with Adjustable Thermostat (Fully-Submersible, Shatterproof De...

User Ratings: 69 13

Cobalt Aquatics 31005 First Impressions

"Works as intended."

I love the heater otherwise, but I'm afraid some water has gotten inside the heater. My fish likes to get close to it and he has never been hurt by it. I emailed the email it says to and told them. Bought it as a chiller for the k40 CO2 laser. Very easy to install and the adjustable temperature gauge is pretty accurate. Now, both points are clear on the package instructions. Beware, but we are hoping for a good outcome!

  • Cobalt Aquatics Flat Neo-Therm Heater with Adjustable Thermostat (Fully-Submersible, Shatterproof Design) from 25W to 300W
  • Super-flat design. Fully submersible, modern design for energy efficient Aquarium and terrarium heating. Includes reversible holster/bracket, which allows heater to face inward or outward. See the product images to determine the best neo-therm size for your tank.
  • Accurate, one-touch system. Simply set temperature between 66-96°f with one touch and the neo-therm electronic thermostat will maintain Tank temperature within +0.5°F. Led displays both set temp and actual temp, simultaneously.
  • Ultimate safety and reliability. Integrated thermal protection circuitry prevents heater from overheating. If you forget to turn it off, the neo-therm will automatically shut it down.
  • Virtually indestructible. Unlike cheap, glass heaters, the neo-therm is a resin/thermoplastic heater with a shatterproof outer-casing. Made in Poland and includes a 3-year warranty.
  • Manufacturer You can trust. Most manufacturers rate their heaters on the ability to raise an aquarium 2-3°f above ambient temperatures. This is unreliable and misleading, as the average home fluctuates 2-3°f or more throughout the day. Cobalt rates The neo-therm on the ability to raise a tank 11°f above ambient temperatures, so you will never have to worry about overworking the neo-therm or it keeping up!
  • Manufacture: Cobalt International Inc.
  • Product Dimensions: 2.25 x 1.25 x 11 inches; 8 Ounces
  • Editor's Impressions Of The Cobalt Aquatics 31005
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Cobalt Aquatics 31005 Final Thoughts

"Well written but vague."

It comes with a hanging kit and can be secured on the edge of the tank. I have 3 of the Fluval heaters, in various sizes. This little heater is perfect; this is our third purchase of the same heater. I have only had minor problems with the suction cups. It took me a few days slowly turning the dial up to finally get it where I wanted. I use this little heater for my 10 gallon quarantine tank. I dont know, and havent tried just yet.

Overall Score
4.2


(1419 Points)

2. Orlushy Mini Aquarium Heater 50W 100W 150W,Small Fish Tank Heater with LED Digital Temperature Displ...

User Ratings: 71 7

Orlushy First Impressions

"Very pleased so far."

Also were nice along the whole process. I have a 10gallon tank that was at 72 degrees. We would consider a replacement and then we would return the defective unit. I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. The temperature difference was very minor. --Temperature adjustment labeling is on top rather than on the rod. I waited a little bit to write the review so it could be accurate.

  • Orlushy Mini Aquarium Heater 50W 100W 150W,Small Fish Tank Heater with LED Digital Temperature Display and External Temperature Controller for Betta Frogs Newts Turtles
  • ★ 50W Submersible Aquarium Heater is Suitable for 3-10 Gallon.Temperature range: 65°F~93°F(18°C~34°C), power cord is 5 FT.
  • ★ LED Display Design: LED digital display, External temperature controller,easy to use and Safety.
  • ★ The Digital Smart Aquarium Heater is a heater and thermometer combined into one, eliminating the need for more equipment in smaller tanks.
  • ★ Please be sure that the heater needs to be completely sunk into water, horizontal or vertical fixed in the water cycle better place, and let the working light can be seen as clear as possible.
  • ★ Applicable for freshwater and marine aquariums, aquaculture, glass containers, and hydroponic systems
  • Manufacture: Nova pet supplies co.LTD
  • Product Dimensions: 4 x 2.75 x 1.6 inches; 8.78 Ounces
  • Editor's Impressions Of The Orlushy
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Orlushy Final Thoughts

"Quality was amazing."

It would stick out of my 30 g wide tank if I were to put it vertical. Well worth the money the first one I bought still works great. We received the chiller promptly and put it into use. But I am single and don't have to worry about this. Or better yet, conceal it to the back corner. If the water runs low or air gets in the heater shuts off. I'm in the process of setting up for tanks.

Overall Score
4.4


(2168 Points)

3. Orlushy Submersible Aquarium Heater,100W/150W/200W/300W Fish Tahk Heater with Adjust Knob Thermostat...

User Ratings: 77 3

Orlushy First Impressions

"Highly recommended."

It's only been set up for a month we'll see how well it does in a few months. This does a great job at regulating the temp in my 10 gallon. Seems to keep the temp n the tank fairly regular. But my guys don't read them and don't listen! I'm not a big fan of the big glass tubes. --Temperature adjustment labeling is on top rather than on the rod. Easy enough to let it run all the time.

  • Orlushy Submersible Aquarium Heater,100W/150W/200W/300W Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups and Free Thermometer Suitable for Marine Saltwater and Freshwater
  • ★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
  • Manufacture: Nova pet supplies co.LTD
  • Editor's Impressions Of The Orlushy
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Orlushy Final Thoughts

"5 stars in my book!"

I was amazed how quickly I got to my temperature I need it 78 degrees. I am very happy with this purchase. The heater is easy; turn the dial to set temp and plug in. I am very happy with this purchase. My fish likes to get close to it and he has never been hurt by it. At this time I highly recommend this product. Awesome chiller, perfect for Hydroponics.

Overall Score
4.6


(2456 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. HITOP 25W 50W 100W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction ...

User Ratings: 70 5

HITOP HP 608 First Impressions

"Bought the 300W one."

Personally for me the housing doesn't bother me. I used to try those other cheap heaters sold on amazon. Sometimes it gets outside of it's ability to cool but only within a few degrees. There is a misconception on the internet that the heater isn't fully submersible. Easy enough to let it run all the time. I noticed my old hygger heater beginning to fail and my wife ordered this one. This heater warmed it right up and now my Betta and guppies are more active.

  • HITOP 25W 50W 100W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup
  • 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).
  • 50W aquarium heater, length 7.8-inch, power cord 4.9ft, designed for small fish tanks, recommended for aquariums up to 20 Gallons.
  • Bonus a stick-on thermometer, no need to buy another thermometer, 24-Hour Professional After-sales Service.
  • Manufacture: Haisen
  • Product Dimensions: 7.87 x 0.98 x 0.98 inches; 8.78 Ounces
  • Editor's Impressions Of The HITOP HP 608
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

HITOP HP 608 Final Thoughts

"So far it seems great!"

I tested it by unplugging and replugging it. The red light means it's off, blue light means the temperature is constant. The heater is easy; turn the dial to set temp and plug in. It's pretty noticeable, but I don't really care. The temperature gauge is fairly accurate in my 55 gallon tank. This this is amazing and is worth the money. After several weeks of running the heater.

Overall Score
4.4


(960 Points)

6. Famus Aquarium Fish Tank Heater Protective Case Detachable Designed Cover with Suction Cups(42.5 cm)...

Famus First Impressions

"Seems very well built."

It is a bonus that the heater is titanium. If the blue light is flashing it means the heater is not fully submersible. Once attached to the tank wall I've had no issues with it coming off. Pressing and holding the button for 5 seconds changes it from F to C readouts. There is a misconception on the internet that the heater isn't fully submersible. I like to keep it at 72 and from my thermometer it is reading at exactly 72. You don't have to worry about wide temperature swings with this unit.

  • Famus Aquarium Fish Tank Heater Protective Case Detachable Designed Cover with Suction Cups(42.5 cm)
  • Manufacture: Famus
  • Editor's Impressions Of The Famus
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

Famus Final Thoughts

"Easy to unpack."

This heater warmed it right up and now my Betta and guppies are more active. My heater is fully submerged underwater and works perfectly fine. I bought a similar one at the pet store and it barely worked. The temperatures are pretty accurate. Temperature is slightly off by running a little warmer. I use a 50 for a 5 gal and a 10 gal tank. I got this heater for my 55 gallon aquarium.

Overall Score
3.0


(1 Points)

7. DECJ Submersible Aquarium Heater, 25W/50W/100W/150W/200W/ Fish Tahk Heater, with Adjust Knob Thermos...

DECJ First Impressions

"Very quick shipping."

If the blue light is flashing it means the heater is not fully submersible. I bought a similar one at the pet store and it barely worked. This has the best controller that I have found on the market. They shipped us the upgraded version that also heats! I tested it by unplugging and replugging it. This is only day one though, so I shall keep an eye one it. The bonus digital thermometer it came with has been super helpful, and is accurate.

  • DECJ Submersible Aquarium Heater, 25W/50W/100W/150W/200W/ Fish Tahk Heater, with Adjust Knob Thermostat 2 Suction Cups and Free Thermometer, Suitable for Marine Saltwater and Freshwater,150watt
  • IP68 WATERPROOF: This fish tank heater is waterproof, must be fully submerged in water when working, stick it with suctions horizontally or vertically onto the tank side near the water intake or where the way of water flow. Please unplug the power supply when cleaning the fish tank or aquarium water changes.
  • LED DISPLAY: Electronic Thermostat accurate to +/- 1 ℃, no need to buy another thermometer, Clearly show the temperature you set, the red indicator light is on when it start to heat your tank, and the blue indicator is on when tank reaches the temperature you regulates.
  • OVER-HEATED & SAFTY PROTECTION: When water temperature reaches to set temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. When lack of water, the heater will stop working to prevent dry burning.
  • TEMP ADJUSTABLE(℃/℉ Switchable): The temperature adjustable range is from 68℉ to 94℉ (20℃-34℃), which is suitable for different aquariums,hydroponics growing system,various ornamental fish and amphibious turtles. Essential for arowana, aquarium fish, fish ponds, and turtles.
  • UNIQUE WATER CHANGER: The water filter has a built-in porous filter to prevent fish or water grass and sand from being sucked out; the water control valve can adjust the water flow size, which is conducive to cleaning relatively small sand and gravel.
  • Manufacture: Aquarium Heaters & Chillers
  • Editor's Impressions Of The DECJ
  • Heat Quality
  • Quality
  • Value For Money
  • Affordability

DECJ Final Thoughts

"Love this heater!"

My marina heater takes a few hours. They shipped us the upgraded version that also heats! And I get to keep the first one I bought! Takes a little while to drop the temps if it is hot in the garage. The heater is super thin and the reflective surface is interesting. I am very happy with this purchase. I like the fact that it comes with a digital thermometer.

Overall Score
5.0


(1 Points)

8. 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)

9. 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)

10. 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
  • Quality
  • Value For Money
  • Affordability

BoTaiDaHong Final Thoughts

"Amazing customer service."

The setting always stayed the same. Awesome chiller, perfect for Hydroponics. Takes a little while to drop the temps if it is hot in the garage. It just cycles through to 93f and starts over. I hope these suction cups work very well. This this is amazing and is worth the money. We received the chiller promptly and put it into use.

Overall Score
5.0


(1 Points)

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