Editor's Choice - Our Favorite Saltwater Aquarium Heaters

1. 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 [star rating='5']
• Quality [star rating='5']
• Value For Money [star rating='4']
• Affordability [star rating='4.6']

Peoples Choice - Other Highly Rated Saltwater Aquarium Heaters

2. Fluval M Submersible Heater

User Ratings: 80 3

Fluval A782 First Impressions

"The seller was wonderful."

I think it works well to not stand out like other heaters. If the water runs low or air gets in the heater shuts off. I have only had minor problems with the suction cups. They promptly fixed the issue without any delays or drama. This has the best controller that I have found on the market. I will be ordering more of these in the future. This is a powerful heater that holds temperature very well.

• Fluval M Submersible Heater
• Aquarium heater that blends into the aquarium environment with built-in reflective technology that mirrors the surrounding colors
• Computer-calibrated thermostat and easy-to-adjust temperature control dial
• Shock resistant Borosilicate glass and high density ceramic heat sick
• Easy to install with slim profile tube for easy placement
• 100-watt heater suitable for freshwater and saltwater aquariums up to 30 gallons with a 3-year warranty
• Quality heater made in Europe using superior components and construction
• Sleek and compact
• Ideal for 100 L (30 US gal) aquariums
• Manufacture: Fluval
• Product Dimensions: 1.8 x 4.8 x 14.8 inches; 8.82 Ounces

• Editor's Impressions Of The Fluval A782
• Heat Quality [star rating='5']
• Quality [star rating='4.7']
• Value For Money [star rating='5']
• Affordability [star rating='3.7']

3. Mylivell Aquarium Heater Submersible Auto Thermostat Fish Tank Water Heater and Adjustable Temperatu...

User Ratings: 70 5

Mylivell First Impressions

"Great concept."

This has been in my fish tank for a few months now and it's been absolutely perfect! The heater is super thin and the reflective surface is interesting. I recieved this product without the instructions or the added thermometer. Keeps the temperature within 1 degree of what you set it to at all times. I think it works well to not stand out like other heaters. Thanks for the great customer service! The suction cups are large, high quality and seem to stick great.

• Mylivell Aquarium Heater Submersible Auto Thermostat Fish Tank Water Heater and Adjustable Temperature with Suction Cups
• High Quality: Aquarium heater made of high quality quartz glass, double seal material , advanced design, ensures safe operation.
• Adjustable Temperature: The temperature of the fish tank heater can be adjusted automatically. Temperature setting range: 20°~34°C(65° F - 93° F), and the display is easy to read.
• Fully Submersible. Power: 100W. Suggested water volume: 20 gal.
• Both suiting for fresh or saltwater aquariums, provide a constant warm environment for your tropical fish to stay healthy.
• Convenient and Safe: Our aquarium heater thermostat has two suction cups for attachment to the fish tank. The polarized plug prevents electrical shock.
• Mylivell Submersible Aquarium Heaters are one of the most popular way to keep your tank at a steady and controlled temperature, Fish water heater will be your best choice!
• You will need an aquarium heater to keep your tank in a steady and controlled temperature, as proper temperature range is very important to fish and other Aquatic in winter.
• Mylivell Submersible Aquarium Heaters are one of the most popular way to keep your tank at a steady and controlled temperature, Fish water heater will be your best choice!
• Manufacture: Mylivell
• Product Dimensions: 11.6 x 2.7 x 1.5 inches; 7.2 Ounces

• Editor's Impressions Of The Mylivell
• Heat Quality [star rating='4.3']
• Quality [star rating='4.8']
• Value For Money [star rating='4.9']
• Affordability [star rating='5']

4. 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 [star rating='3.9']
• Quality [star rating='4.1']
• Value For Money [star rating='3']
• Affordability [star rating='4.3']

Honorable Mentions - More Top Selling Saltwater Aquarium Heaters

5. ViaAqua 300-Watt Quartz Glass Submersible Heater with Built-In Thermostat

User Ratings: 73 5

ViaAqua VA 300Q First Impressions

"Highly recommended."

The temperature lights up so it's very easy to read. The heater is super thin and the reflective surface is interesting. Was very impressed with the quality of this heater. The line is there due to regulations in certain countries. They shipped us the upgraded version that also heats! I use this little heater for my 10 gallon quarantine tank. I used to try those other cheap heaters sold on amazon.

• ViaAqua 300-Watt Quartz Glass Submersible Heater with Built-In Thermostat
• High quality quartz glass
• Fully-submerisble
• Visible temperature setting
• For use in fresh or saltwater aquariums
• Manufacture: Commodity Axis
• Product Dimensions: 1.13 x 1.13 x 14.8 inches; 10.88 Ounces

• Editor's Impressions Of The ViaAqua VA 300Q
• Heat Quality [star rating='4']
• Quality [star rating='3.8']
• Value For Money [star rating='3.6']
• Affordability [star rating='3.9']

6. Fluval Marina Submersible Heater for Aquarium, Mini

User Ratings: 59 9

Marina 11230 First Impressions

"Best value."

We wish the controls were available in Farenheit also to make things a little easier. It would stick out of my 30 g wide tank if I were to put it vertical. There is a misconception on the internet that the heater isn't fully submersible. No biggie, but annoying nonetheless. I would definitely recommend this product. Sometimes it gets outside of it's ability to cool but only within a few degrees. It's pretty noticeable, but I don't really care.

• Fluval Marina Submersible Heater for Aquarium, Mini
• 25-Watt submersible heater for freshwater or saltwater aquariums
• Easy to read temperature settings
• Impact-resistant glass design; waterproof sealing
• Includes bracket with suction cups for easy, secure installation
• Bumper guard to protect fish
• Length: 15 cm (6”)
• Impact-resistant glass design
• Water proof sealing
• Manufacture: Marina
• Product Dimensions: 1.3 x 5 x 10.5 inches; 6.4 Ounces

• Editor's Impressions Of The Marina 11230
• Heat Quality [star rating='4.4']
• Quality [star rating='4.4']
• Value For Money [star rating='3.8']
• Affordability [star rating='4.3']

7. ViaAqua 200-Watt Quartz Glass Submersible Heater with Built-In Thermostat

User Ratings: 74 5

ViaAqua VA 200Q First Impressions

"Temperature!"

Personally for me the housing doesn't bother me. It took me only two tries to get it to the correct temperature. Easy enough to let it run all the time. I left seller feedback yesterday but have yet to hear from the seller. Come on Fluval, expect better from you. This heater is NOT fully submersible. I had a thermometer on opposite side of tank and the heater was dead on true.

• ViaAqua 200-Watt Quartz Glass Submersible Heater with Built-In Thermostat
• High quality quartz glass
• Fully-submerisble
• Visible temperature setting
• For use in fresh or saltwater aquariums
• Manufacture: Commodity Axis
• Product Dimensions: 1.13 x 1.13 x 12.5 inches; 9.44 Ounces

• Editor's Impressions Of The ViaAqua VA 200Q
• Heat Quality [star rating='4.7']
• Quality [star rating='4.7']
• Value For Money [star rating='5']
• Affordability [star rating='5']

8. hygger 50W 100W Submersible Digital Display Mini Aquarium Heater for Small Fish Tank, Compact and Fa...

User Ratings: 67 10

hygger First Impressions

"This heater works great."

The red light means it's off, blue light means the temperature is constant. 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. This does a great job at regulating the temp in my 10 gallon. This heater works, but the dial it isn't very accurate. My heater is fully submerged underwater and works perfectly fine. The bonus digital thermometer it came with has been super helpful, and is accurate.

• hygger 50W 100W Submersible Digital Display Mini Aquarium Heater for Small Fish Tank, Compact and Fast Heating Thermostat, with External Controller and Built-in Thermometer, for Betta Turtle
• 【Compact Small Heater】110-120V/60HZ oval shape design little aquarium heater, fast heating for small fish tank. 50W tank heater is for 1-6.5gallon, 100W tank heater is for 6.5-13 gallon. Heater Dimension: 2.7x1.4x 4.5 inch. The power cord is 5ft, long enough for use indoors. With 2 strong suction cups at the back side of the betta heater, it's easy to install it on to glass, acrylic or plastic tank
• 【External Controller】easy to set the temp on the controller, only show farenheit temp, you can set the temp range from 63℉ to 94℉, temp accuracy 1℉. Every time you set the temp, just press the button over and over until it reaches to your desired temp, then stop and wait the digit flashing for 3 times, then setting is done. Keep the controller away from water, it's not waterproof
• 【Digital Display】with led display on the midle of the heater front side, when the fish tank heater is heating, there indicator light above the digit is on red, when it stop heating, the light is off. The heater with a built-in thermometer, when temp setting is done, the led will show the water temp all the time. The led will display the set temp digit only when you press the controller
• 【Reliable Thermostat】this an automatic aquarium thermostat, after finishing the temp setting, you can be confidence on that it will maintain the tank water at the temp you set. The tank heater will stop heating when the water temp reaches to set temp, it will restart to heating when the water temp is 1℉ off the set temp. If the water temp is over 95℉, the heater will auto shut off and led displaying HH, it will work normally again when the water temp is lower than 95℉
• 【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 E1, when fully in water again it will return to normal work again
• Compact and small shape, with plastic guard.
• It has memory function if power failure happens.
• With 2 strong suction cups, can be replaced.
• Manufacture: hygger
• Product Dimensions: 2.76 x 1.38 x 4.53 inches; 9.59 Ounces

• Editor's Impressions Of The hygger
• Heat Quality [star rating='3.7']
• Quality [star rating='3.4']
• Value For Money [star rating='3.3']
• Affordability [star rating='3.2']

9. Fluval Marina Submersible Heater for Aquarium

User Ratings: 68 7

Marina 11233 First Impressions

"The accuracy is perfect."

This product came in the nick of time! I got this heater for my 55 gallon aquarium. They promptly fixed the issue without any delays or drama. When i installed them, i let them sit in the tanks without power for 6-24 hours. I adjusted the set temperature a little lower to be more in the range I wanted. Those turned out to be a hit and miss. I think it works well to not stand out like other heaters.

• Fluval Marina Submersible Heater for Aquarium
• Submersible heater for fresh or saltwater aquariums or reservoirs
• Easy to read temperature settings
• Impact-resistant glass design; Water proof sealing
• Includes bracket with suction cups for easy, secure installation
• Length: 8.5 Inch
• Manufacture: Marina
• Product Dimensions: 1.5 x 1.5 x 8.5 inches; 9.6 Ounces

• Editor's Impressions Of The Marina 11233
• Heat Quality [star rating='4.8']
• Quality [star rating='4.7']
• Value For Money [star rating='4.5']
• Affordability [star rating='5']

10. LONDAFISH Aquarium Chillers Aquarium Fan Fish Tank Cooling Fan Marine 2 Fan

User Ratings: 60 11

LONDAFISH First Impressions

"The accuracy is perfect."

And kids love pushing all sorts of buttons. This product came in the nick of time! I use a 50 for a 5 gal and a 10 gal tank. Easy enough to let it run all the time. I got a hold of Amazon, who put me in touch with the seller. Was very impressed with the quality of this heater. It is safe and dependable and comes with a one year warranty.

• LONDAFISH Aquarium Chillers Aquarium Fan Fish Tank Cooling Fan Marine 2 Fan
• Two-speed wind control,according to the indoor temperature,reduce water temperature and drop up to 2 ~ 3℃
• Adjustable jaws can clamp the the cylinder wall that the thickness within 1.2cm，meet the daily use of fish tanks
• Great cooling fans 12V safe voltage,with high security standards and ensure the safety of the fan
• Angle adjustable:Adjustable width of fan and bracket up to 100°,practical and easy to install and move
• Safety Packing With Wonderful After Sale Service: The powerful jet lighter is packaged in an attractive gift box which is a great gift for yourself, friends and families. We provide with 90 days return and refund service and all the emails will be replied within 24 hour. We provide lifetime technique support, if you have any question, please feel free to contact us.
• Great cooling fans provide powerful ventilation to reduce heat transference from aquarium equipment. Extremely quiet operation with adjustable positioning, perfect for saltwater aquarium(reef and frag tank) and fresh water aquarium.
• No assembly required, easy and convenient for use. Easy installation(clamp mounting bracket).
• Low power consumption, adjustable 2 level of wind force.
• Manufacture: LONDAFISH

• Editor's Impressions Of The LONDAFISH
• Heat Quality [star rating='5']
• Quality [star rating='4.8']
• Value For Money [star rating='3.1']
• Affordability [star rating='4.2']