Editor's Choice - Our Favorite Penn-Plax Aquarium Heaters

1. Penn-Plax Aquarium Heater Fully Submersible Within 1 Degree of Accuracy 75 Watt Heats Up to 15 Gallo...

User Ratings: 64 10

Penn-Plax CH850 First Impressions

"Quality was amazing."

I have a few of these and I use them in my 55 gallons tanks and a 29 gallon tank. Or better yet, conceal it to the back corner. I used to try those other cheap heaters sold on amazon. I went ahead and went with the the larger 300W for my 45 gallon. The line is there due to regulations in certain countries. Sometimes it gets outside of it's ability to cool but only within a few degrees. Sometimes it gets outside of it's ability to cool but only within a few degrees.

  • Penn-Plax Aquarium Heater Fully Submersible Within 1 Degree of Accuracy 75 Watt Heats Up to 15 Gallon Tank
  • Aquarium heater sets and maintains the temperature in your tank within 1 degree accuracy.
  • Features both Fahrenheit and Celsius temperature with easy to read gage.
  • Heater is fully submersible and can be placed horizontally or vertically in your tank.
  • Has a preset temperature to 76 degrees Fahrenheit but is also easily programmed.
  • Heater is safe to use on smaller fish tanks and aquariums up to 10 gallons in size.
  • Manufacture: Monster Pets
  • Product Dimensions: 7 x 1.5 x 3 inches; 1 Ounces
  • Editor's Impressions Of The Penn-Plax CH850
  • Heat Quality [star rating='3.3']
  • Quality [star rating='3.6']
  • Value For Money [star rating='3.8']
  • Affordability [star rating='4.2']

Penn-Plax CH850 Final Thoughts

"I angled it."

My heater is fully submerged underwater and works perfectly fine. They promptly fixed the issue without any delays or drama. But I am single and don't have to worry about this. This is only day one though, so I shall keep an eye one it. Come on Fluval, expect better from you. I was amazed how quickly I got to my temperature I need it 78 degrees. There is no protection from it banging on the glass tank.

Overall Score
4.2

[star rating="4.2"]
(848 Points)

2. Eheim Jager Aquarium Thermostat Heater

User Ratings: 72 7

Eheim 3619090 First Impressions

"I angled it."

For Discus you need warm and accurate heater and this seems to do the trick. I wouldn't buy any other heater, unless one of these stops working. Maintains it well except when the weather is already warm then it over heats it. I like how the heater is constructed. This is only day one though, so I shall keep an eye one it. The design is sleek and modern looking. Pressing and holding the button for 5 seconds changes it from F to C readouts.

  • Eheim Jager Aquarium Thermostat Heater
  • Fully submersible
  • Thermo safey control protects against running dry
  • Will automatically turn off when water level dips too low
  • TruTemp dial recalibrates the heater for precise temperature regulation
  • Made of shock resistant and shatter proof glass for fresh or marine water
  • On/Off indicator light for at-a-glance monitoring
  • Manufacture: Eheim
  • Editor's Impressions Of The Eheim 3619090
  • Heat Quality [star rating='3.7']
  • Quality [star rating='5']
  • Value For Money [star rating='4']
  • Affordability [star rating='4']

Eheim 3619090 Final Thoughts

"Long heater."

This is only day one though, so I shall keep an eye one it. We would consider a replacement and then we would return the defective unit. I will definitely be buying another one for my other tanks at bigger one. They shipped us the upgraded version that also heats! And kids love pushing all sorts of buttons. We received the chiller promptly and put it into use. I got a hold of Amazon, who put me in touch with the seller.

Overall Score
4.4

[star rating="4.4"]
(3152 Points)

3. 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']

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

[star rating="4.4"]
(475 Points)

4. n a Aquarium Heater,25W 50W Aquarium Fish Tank Submersible Heater,Anti-Scald Fish, with Water Shorta...

User Ratings: 60 8

N / A First Impressions

"I setup a 5."

Those turned out to be a hit and miss. I went ahead and went with the the larger 300W for my 45 gallon. Seems to keep the temp n the tank fairly regular. Product was received fast, works excellent! Ick for instance detaches from fish at 86 degrees and dies at 89. The heater is easy; turn the dial to set temp and plug in. I had a thermometer on opposite side of tank and the heater was dead on true.

  • n a Aquarium Heater,25W 50W Aquarium Fish Tank Submersible Heater,Anti-Scald Fish, with Water Shortage Protection and Aquarium Thermometer, for 3 to 25 Gallon Fish Tank Water Tank
  • [Automatic temperature control chip]: Aquarium Heater can automatically adjust the temperature between 77 ° F and 82 ° F (25 ° C to 28 ° C). It is different from the traditional manual adjustment of other aquarium heaters, without setting. It will automatically turn on / off to reach the set temperature continuously and steadily.
  • [Gift temperature sticker]: Paste the temperature sticker to the surface of the water tank, and you can use it to monitor the temperature.
  • [Stable and high-grade materials]: strong industrial plastics, non-toxic and durable. It has explosion-proof, anti-expansion functions, high temperature resistance and safety. Suitable for betta fish, such as turtles and lace. Length-13.97 cm, width-2.29 cm, thickness-1.68 cm.
  • [What capacity is suitable]: 25W fish tank heater is suitable for 9.83 liters to 1.83 liters, and can be used for mini fish tanks and aquariums. This aquarium heater is equipped with a suction cup, which can be easily absorbed in the aquarium. Easy to hide in the water tank.
  • [Warranty and quality assurance]: We provide 24-hour guidance service, you can contact us at any time, and one year of quality problems return service. This product aquarium heater has passed CE, ROHS, FCC certification. Explosion-proof, waterproof, anti-expansion, high temperature and other safe operations.
  • Manufacture: n a
  • Product Dimensions: 5.3 x 1 x 0.7 inches; 6.14 Ounces
  • Editor's Impressions Of The N / A
  • Heat Quality [star rating='3.7']
  • Quality [star rating='3.8']
  • Value For Money [star rating='3.1']
  • Affordability [star rating='4.5']

N / A Final Thoughts

"Overall happy."

The heater is super thin and the reflective surface is interesting. The temperature lights up so it's very easy to read. I think it works well to not stand out like other heaters. The temperature difference was very minor. Awesome chiller, perfect for Hydroponics. This is a great heater that is very easy to set up and program. Easy to read the temp and know exactly how warm the water is.

Overall Score
4.1

[star rating="4.1"]
(51 Points)

5. SunGrow Betta Plakat Heater, 10-Watt Submersible Aquarium Water Heater for Small Tanks (1.5-Gallons)...

User Ratings: 72 8

SunGrow First Impressions

"5 gallon tank."

I went ahead and went with the the larger 300W for my 45 gallon. The heater is super thin and the reflective surface is interesting. The bonus digital thermometer it came with has been super helpful, and is accurate. We wish the controls were available in Farenheit also to make things a little easier. Bought it as a chiller for the k40 CO2 laser. Pressing and holding the button for 5 seconds changes it from F to C readouts. Beware, but we are hoping for a good outcome!

  • SunGrow Betta Plakat Heater, 10-Watt Submersible Aquarium Water Heater for Small Tanks (1.5-Gallons), with Preset Temperature Capability, Suction Cups Included
  • ✔ KEEP YOUR BETTA HEALTHY --- To ensure that your betta has optimal health, you need to provide her with warm water. The water in the tank should not go below 74°F for optimal comfort and metabolic efficiency of your crown tail betta. The cold temperature for this gourami family fish will make her lethargic, stressed, and miserable.
  • ✔ AUTOMATICALLY REACHES THE PRESET TEMPERATURE --- The smart SunGrow heater for this freshwater fish has a built-in electronic thermostat to automatically maintain water around 72°F which is ideal for most tropical fish. It saves you from the trouble of constantly keeping a check on the temperature of your tank. It will automatically shut down when it will reach the desired temperature, no manual adjustment is needed.
  • ✔ CREATES THE IDEAL CONDITIONS FOR FLORA AND FAUNA --- The eastern Asian fish species can survive in a freshwater environment. This heater by SunGrow will create ideal conditions for them. A few preconditions are required to allow it to run with maximum efficiency. The heater must be completely submerged in the water and the indoor temperature should be around 62-74°F.
  • ✔ SUCTION CUPS INCLUDED FOR EASY INSTALLATION ---- Easily install the SunGrow Heater vertically or horizontally by using the built-in suction cups to attach to your tank. The best location to place the heater is in the stream of a powerhead or near the water flow, such as the outlet (or inlet) from the filter. This way the heat is evenly distributed throughout your tank.
  • ✔ FULLY SUBMERSIBLE WATER HEATER--- This 10-watt aquarium heater supports 1.5 gallons (5 liters) fish tank. Its exterior is designed with tougher than glass and the sealed polymer can be submerged into your tank. The heating element is surrounded by a thick plastic to ensure the protection of these caudal-finned betta fish.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Heat Quality [star rating='4.8']
  • Quality [star rating='4.7']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='3.8']

SunGrow Final Thoughts

"Temperature!"

It would stick out of my 30 g wide tank if I were to put it vertical. It took about an hour to reach 80f, which is fairly quick. My fish likes to get close to it and he has never been hurt by it. Was very impressed with the quality of this heater. I left seller feedback yesterday but have yet to hear from the seller. I will be ordering more of these in the future. We received the chiller promptly and put it into use.

Overall Score
4.4

[star rating="4.4"]
(71 Points)

6. PULACO 25W Mini Aquarium Heater, Betta Fish Tank Heater for 1-5 Gallon Small Fish Tanks

User Ratings: 58 14

PULACO PL-168 First Impressions

"Overall happy."

It's pretty noticeable, but I don't really care. Two inches above that is a waterline for maximum. The temperatures are pretty accurate. No biggie, but annoying nonetheless. It's pretty noticeable, but I don't really care. I noticed my old hygger heater beginning to fail and my wife ordered this one. I have only had minor problems with the suction cups.

  • PULACO 25W Mini Aquarium Heater, Betta Fish Tank Heater for 1-5 Gallon Small Fish Tanks
  • ★【Quartz glass heater】: The heating device is made of heat-resistant quartz glass, explosion-proof and strong thermal conductivity. It can be used for 1-5 gallon glass or acrylic fish tanks.
  • ★【Easy to operate】: This heater is different from traditional heaters. It is designed with an external controller for temperature display and temperature adjustment, which can freely adjust the temperature you need (68°F-93°F).
  • ★【Intelligent temperature control】: The heater effectively maintains the temperature you preset before, and stops heating when the water temperature reaches the preset temperature, and restarts heating when the water temperature is lower than the preset temperature by 2-3°F.The red light on the LED screen indicates that the heater is heating, and the blue light indicates that the heater has finished heating and is in a constant temperature state.
  • ★【Note】: The heater needs to be fully submerged, the external controller is not waterproof, and children need to be used under the supervision or guidance of adults.
  • ★【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.
  • Plug in, the controller LED lights on, press the button and switch it continuously until the LED display shows your expecting temperature (From 68~93℉ ), and wait 3 seconds for system confirmation, then heater will start heating up to your preset temperature.
  • Red lights means the heater is on heating mode, when heater heating up to the preset temperature, blue lights on, and heater will stop heating (Restart heating when temperature less than preset temperature)
  • Operation for example: Plug in and LED display shows preset temperature 68℉, you want adjust it to 78℉, then press the button 10 times continuously, LED display will shows 78℉, and wait 3 seconds flashing, then setting fishined, heater will start heating from 68℉ to 78℉.
  • Manufacture: PULACO
  • Product Dimensions: 3.34 x 1.77 x 6.7 inches; 4.32 Ounces
  • Editor's Impressions Of The PULACO PL-168
  • Heat Quality [star rating='4.2']
  • Quality [star rating='3.1']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='3.2']

PULACO PL-168 Final Thoughts

"What a long."

It just cycles through to 93f and starts over. Bought it as a chiller for the k40 CO2 laser. I had a thermometer on opposite side of tank and the heater was dead on true. This has the best controller that I have found on the market. The cover over the heating tubes is great, the turtles claws can't damage the tube. It does blend well in some setups and may look bulky in others. After several weeks of running the heater.

Overall Score
4.0

[star rating="4"]
(38 Points)

7. HITOP 50W 100W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater, Thermostat for Turtle ...

User Ratings: 76 7

HITOP First Impressions

"Very easy and accurate."

What more could you ask for great job Hygger Duncan. Very easy to install and the adjustable temperature gauge is pretty accurate. I got the 200W variant for my 54 gallon corner tank that's housing goldfish. Beware, but we are hoping for a good outcome! There is no protection from it banging on the glass tank. My marina heater takes a few hours. The heater protector was very heavy plastic and slim lined which is great.

  • HITOP 50W 100W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater, Thermostat for Turtle Tank
  • 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
  • Editor's Impressions Of The HITOP
  • Heat Quality [star rating='3.7']
  • Quality [star rating='4.2']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='4.5']

HITOP Final Thoughts

"Quality was amazing."

And I get to keep the first one I bought! We would consider a replacement and then we would return the defective unit. Also I like how it shows both the current temperature and the set temperature. Per my thermometers, they are all staying constant. This is only day one though, so I shall keep an eye one it. I contacted the manufacturer and they sent me a new unit in less than a week! My fish likes to get close to it and he has never been hurt by it.

Overall Score
4.5

[star rating="4.5"]
(125 Points)

8. hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 500W 800W Submersible ...

User Ratings: 75 8

hygger First Impressions

"Great concept."

The temperature lights up so it's very easy to read. Keeps the temperature within 1 degree of what you set it to at all times. I'm in the process of setting up for tanks. Was very impressed with the quality of this heater. I have a 10gallon tank that was at 72 degrees. I will be ordering more of these in the future. It took me a few days slowly turning the dial up to finally get it where I wanted.

  • hygger Fast Heating Titanium Aquarium Heater with LED Digital Temp Controller 500W 800W Submersible Fish Heater for 60-180 Gallon Freshwater Marine Tank
  • 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 titanium and double sealed by black protective guard, this fish tank heater is resistant to explosion and 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. Temp accuracy is +/- 1°F.
  • Easy to set temperature without getting hands wet. Build in hand button, Keep pushing the button. It will cycle through all the set temperatures. Temperature can be precisely adjusted from 70 to 94°F
  • 800W aquarium heater, voltage 110-120V, suitable for tank capactiy 120-180 gallon freshwater and marine water aquariums
  • Do not bury under gravel
  • Always keep heater rod fully submerged
  • IP68 100% Waterproof, Fully Submersible
  • Manufacture: hygger
  • Editor's Impressions Of The hygger
  • Heat Quality [star rating='3.6']
  • Quality [star rating='4']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.2']

hygger Final Thoughts

"This heater is excellent."

I was worried about the quality but I am thoroughly impressed with this heater! This is a powerful heater that holds temperature very well. This is a powerful heater that holds temperature very well. Also were nice along the whole process. There is no protection from it banging on the glass tank. There is no protection from it banging on the glass tank. We received the chiller promptly and put it into use.

Overall Score
4.4

[star rating="4.4"]
(400 Points)

9. hygger 200W Aquarium Heater with LED Display Controller Submersible Fish Tank Heater for 15-30 Gallo...

User Ratings: 73 9

hygger HG-925 First Impressions

"Works fine."

I went ahead and went with the the larger 300W for my 45 gallon. It comes with a hanging kit and can be secured on the edge of the tank. I got a hold of Amazon, who put me in touch with the seller. Very easy to install and the adjustable temperature gauge is pretty accurate. Two inches above that is a waterline for maximum. This is a great heater that is very easy to set up and program. The temperature difference was very minor.

  • hygger 200W Aquarium Heater with LED Display Controller Submersible Fish Tank Heater for 15-30 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
  • 200 watt aquarium heater, voltage 110-120 V, heater rod 6.3 inches long, suitable for tank capacity 15-30 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 [star rating='3.9']
  • Quality [star rating='5']
  • Value For Money [star rating='4']
  • Affordability [star rating='3.8']

hygger HG-925 Final Thoughts

"Overall happy."

At this time I highly recommend this product. I wouldn't buy any other heater, unless one of these stops working. The controller is easy to use, very accurate and reliable. Personally for me the housing doesn't bother me. So if you set it to 78 degrees, the heater will not kick on until it reads 76. --Temperature adjustment labeling is on top rather than on the rod. The heater is being used in a 40 gallon breeder.

Overall Score
4.3

[star rating="4.3"]
(31 Points)

10. 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 [star rating='3.4']
  • Quality [star rating='4.1']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.9']

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

[star rating="4.4"]
(185 Points)

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