10 Best Saltwater Aquarium Heater Consumer Reviews

Best Saltwater Aquarium Heater

The best saltwater aquarium heater is the one that will never let you down in terms of proper functioning. Apparently, this isn’t feasible.

Heaters are generally low-cost and easy-to-use equipment. However, if one fails, your aquarium will quickly become either fried or a popsicle. Even for the best saltwater aquarium heater is liable to malfunction.

A mechanical thermostat that is constantly cycled will ultimately become stuck “on” or “off.” When purchasing a tank heater, the most dependable option should not be the sole consideration. My strategy is to use a failsafe mechanism.

If one component of the heating system for your fish tank fails, your aquarium will not be destroyed. Further in the blog, I will go through how to set up a failsafe tank heating system. It’s also a good idea to replace your heater on a frequent basis. Some individuals suggest that you do this every year. Tank heaters are quite affordable, but they may be disastrous if they fail.

Aquarium Heater Guide:

The temperature of your tank plays an essential role in your fish’s health and well-being. Fish, apart from humans and other animals, do not generate their natural heat. To keep their temperature of the body, they must depend on the water temperature. As a result, it’s critical that you maintain the correct temperature in your tank for your critters. This tank heater tutorial will teach you all there is to know about tank heaters.

Types of heaters

It’s not difficult to choose the right heater for your tank if you understand the distinctions between the different types of heaters. Immersible heaters, submersible heaters, substrate heaters, and filter heaters are the four primary types of tank heaters.

1. Hanging Aquarium Heaters

The most popular and inexpensive heaters are hanging heaters. A hanging heater is included in almost all tanks to assist inexperienced aquarists in maintaining the proper temperature of the water for freshwater tropical fish.

These heaters feature a glass tube with a heating element inside that dangle from the top edge of the fish tank, generally behind the fish aquarium. A hanging heater necessitates cutting a hole in the fish tank cover to fit the heater’s top, although most fish tank designs have a portion specifically intended to accept a hanging heater or filter.

2. Submersible Aquarium Heaters

The submersible tank heater may be fully submerged in the tank’s water. These heaters are typically more efficient than hanging fish tank warmers since they are totally submersible. These heaters are suitable for use in lower water regions.

Submersible tank heaters can be mounted vertically, diagonally, or at an elevation, but vertical or horizontal installation is recommended. If your submersible heater includes an inbuilt thermostat, placing it laterally in the aquarium and low in the water column is typically more effective. This will allow the thermostat to obtain an accurate measurement of the tank temperature and appropriately turn on and off the heater.

3. Aquarium Substrate Heaters

The tank substrate heater is the least popular internal tank heater, whether it be for enthusiast or pet maintenance. Substrate heaters are especially useful in planting tanks where gravel acts as an insulator and keeps plant roots excessively chilly.

A spiral or mesh of wire in an insulator submerged in tank gravel or substrate makes up the substrate heater. The heater’s core is the wire, which becomes heated whenever the heater is turned on and heats the gravel in the tank. The temperature from the gravel is subsequently reflected into the water, warming it. The thermostat will turn off the heater when the water is heated enough.

4. In-Sump Aquarium Heaters

You may very well have heard of in-sump tank heaters or sump heaters on chance. Typically, this sort of tank heater is an underwater tank heater put in the trickling filter’s water tank, rather than in the aquarium itself.

By mitigating the chances of tank heaters, this arrangement provides improved fish protection. More aggressive fish, such as Oscars, reduce the likelihood of crashing or falling into the aquarium heater and breaking it. While the tank is being serviced, it is doubtful that the tank heater would be reimbursed if a fish gets stuck in the rear of the heater and burns.

10 Best Saltwater Aquarium Heater (Comparison Table)

Fluval E Series Advanced Electronic Heater for AquariumsFluval E Series Advanced Electronic Heater for Aquariums
  • LCD temperature display available
  • Fast heat technology 
  • Equipped with a slim profile mounting bracket
  • Colored display alert system
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Aqueon Adjustable Pro Aquarium HeaterAqueon Adjustable Pro Aquarium Heater
  • Adjustable heat setting
  • Fully submersible
  • Includes suction cups for installation and placement
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Eheim Jager Aquarium Thermostat HeaterEheim Jager Aquarium Thermostat Heater
  • Thermo safey control protects against running dry
  • Made of shock resistant and shatter proof glass 
  • On/Off indicator light for at-a-glance monitoring
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Tetra HT Submersible Aquarium HeaterTetra HT Submersible Aquarium Heater
  • All Tetra HT heaters have indicator lights
  • Ideal for aquariums between 2 to 10 gallons with hoods or glass canopies
  • The HT heater is fully submersbile 
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Marineland Precision Heater for SaltwaterMarineland Precision Heater for Saltwater
  • This 50 watt heater is for aquariums up to 12 gallons.
  • Adjustable temperature dial allows you to set the temperature 1 degree with every click.
  • Easy to view sliding scale tells the exact temperature setting
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Finnex Deluxe Titanium Heating TubeFinnex Deluxe Titanium Heating Tube
  • Controller is needed to operate Titanium Tube.
  • Deluxe Titanium Heating Tube
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Finnex Hang-On Electronic Controller Aquarium HeaterFinnex Hang-On Electronic Controller Aquarium Heater
  • Titanium Tube
  • Sleek analog controller
  • HMA 100: 20-30 Gallons
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JBJ True Temp Titanium Heating SystemJBJ True Temp Titanium Heating System
  • Remote temperature probe
  • Large constant LED display of the current temperature
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ViaAqua 200-Watt Quartz Glass Submersible HeaterViaAqua 200-Watt Quartz Glass Submersible Heater
  • High quality quartz glass
  • Fully-submerisble
  • Visible temperature setting
  • For use in fresh or saltwater aquariums
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Aquatop Digital HeaterAquatop Digital Heater
  • Digital Touch Control
  • Temperatures adjustable between 20c-34c/68-93F. Heating Indicator Included
  • Suitable for tanks up to 80 Gallons
  • Use in Fresh or Saltwater
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10 Best Saltwater Aquarium Heater (Buying Guide)

1. Fluval E Series Advanced Electronic Heater for Aquariums

Category: best electronic saltwater aquarium heater.

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 To be clear, the Fluval Heater is available in 50, 100, 200, and 300-watt power choices, making it extremely adaptable and suited for a wide range of tank sizes.    

  • Features: This Marineland Emperor 400 Pro Series Bio-Wheel Power Filter has following features:
  • Another interesting totally submersible aquarium heater to choose is this one, which comes with simple mounting brackets for easy installation.
  • It may also be installed vertically or horizontally, which is useful. This one, like the other submersible alternatives on the market today, has a specific type of overheat safety to prevent it from drying up and becoming too hot.
  • This device comes with an innovative fish guard to prevent your pets out from the heat source, which increases fish safety.
  • Material: The Fluval P50 heater is entirely submersible and has a safe shatterproof polymer structure. It is intended for tanks up to 15 US Gal (50 L). It has a pre-set thermostat and an LED running lamp, making it equally useful.
  • Temperature setting: It has a pre-set thermostat and an LED running lamp, making it equally useful.  
  • Comes with accurate thermostat
  • Adjustment is easy and accurate
  • Many safety features
  • LCD display
  • Not durable

2. Aqueon Adjustable Pro Aquarium Heater

Category: best plastic saltwater aquarium heater.

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Aqueon appears to be confident in their design, as seen by the heater’s limited lifetime guarantee, which is the longest of any of the heaters I examined. That’s pretty much all there is to it. Now it’s time to put it to the test.    

  • Features: The Aqueon Adjustable Pro Aquarium Heater has following features:
  • I’m pleased to report that the Aqueon Pro checks all of those boxes. I wouldn’t even notice it if it weren’t for the LED light.
  • Two mounting hooks are supplied in the package to keep the heater in place. It takes some work to attach the suction cups to the clips, but once in place, they remain put.  
  • These clamps easily attach to the heater’s thin portion and may be spaced as needed.
  • Material: To be honest, I like the Aqueon Pro’s all-plastic design. A shatter-resistant design that eliminates condensation on the interior of the glass? What’s not to like about that? The heater is extremely attractive for what is basically just a black plastic rod. Note that heaters aren’t meant to draw notice. The great heater is the one that blends into the background of your tank, allowing you to focus on your fish without being distracted.
  • Temperature setting: The temperature control knob is located at the top of the Aqueon Pro. Simply twist to regulate the temperature for your aquarium, which ranges from 68 to 88°F in four-degree increments.  
  • Fully submersible heater
  • Great design
  • Easy to install
  • Provides consistent heating
  • For fresh as well as saltwater.
  • No cons.

3. Eheim Jager Aquarium Thermostat Heater

Category: Best nominal priced saltwater aquarium heater. 

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The Eheim Jager Thermostat appears to be enormous at first look. Yes, it is. It’s enormous. But how does it do in terms of performance? And how does it compare to the efficiency of other heaters? To find out, I bought a 200W Eheim Jager Thermostat and give it a shot on my aquarium to provide you with real-world statistics on how this heater performs on a daily basis.

  • Features: This Eheim Jager Thermostat have following features as follow:
  • This is a high-quality heater that will perform admirably. It warms quickly and maintains a constant temperature. Although I think it’s a little huge, the wide surface area makes it simpler for this heater to keep the water at the proper temperature.
  • It performs admirably, but it lacks several of the features I seek for in a heater, such as a heater shield and an overheat sensor.     
  • Material: There is no heater protection on this heater because it is made of glass. As a result, it is more prone to fractures and breaking than titanium or plastic heaters. When draining your tank, be particularly careful since rapid temperature fluctuations can cause glass heaters to break or shatter, rendering them hazardous to use.
  • The temperature control settings on some heaters are terrible. You cannot tell what temperature you are fixing the heater for on some of them. I also had one that didn’t demonstrate the position on the dial raised or lowered the heat. Heaters with easy-to-read settings are my favorites.  On the top of this heater is a great, easy-to-read temperature dial.
  • Effective and consistent reading
  • Easy to read temperature setting
  • Dry sensor
  • Precise calibration
  • Size is large
  • Exterior is vulnerable

4. Tetra HT Submersible Aquarium Heater 

Category: Best affordable saltwater aquarium heater.

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Another nice totally submersible tank heater to consider is this one. It’s a practical alternative because it comes with mounting gear and suction cups that can simply be plastered onto the interior of the tank.

  • Features: It has following features:
  • For your convenience, this item may be positioned vertically or horizontally.
  • Because it is totally submersible, it has a run-dry prevention mechanism that prevents it from overheating if it isn’t fully immersed.
  • Its tiny size makes it excellent for tanks with limited space, since it can easily be hidden beneath plants or other similar items.    
  • Material: A sturdy and heavy-duty glass tube makes up the Tetra underwater tank heater. This glass tube is so tough and durable that it will not break even if it is hit by a heavy object. Aside from that, the glass is shock-resistant, which means it protects the heating element from mechanical harm. Tetra submersible heaters are so tiny and compact that they may easily fit into whatever tank you have.  
  • Temperature setting:  Because this type only has a 50 or 100-watt choice, it is only suitable for tiny tanks of 2 to 10 gallons with lids or canopies, as the power output is restricted. The Tetra Aquarium Heater is meant to maintain a constant temperature of 78 degrees in the aquarium.   
  • Good for small capacity tanks
  • Affordable option
  • Fully submersible.
  • Can be mounted anyway
  • Temperature can be adjusted

5. Marineland Precision Heater for Saltwater 

Category: Best mica core saltwater aquarium heater.

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The Marineland precision submersible heater is one of the best-rated fish tank heaters on the market. It is among the most often purchased fish tank heaters among fish owners. Marine precision submersible tank heaters are described in depth below. So that you may have a better look at the heater.

  • Features: This is Marineland precision submersible heater comes with all the amazing features such as:
  • It’s difficult to find a tank heating system that’s both dependable and efficient. Fortunately, Marineland aquarium heaters are the appropriate heaters, since they are both sturdy and dependable in terms of effectiveness.
  •  The Marineland precision submersible heater is one of the most efficient tank heaters available. It has a flattened mesh heat source, which is an innovative heating element.
  • The Marineland precision aquarium heater is extremely simple to operate. With this incredible heater, adjusting the temperature is a breeze.
  • Material: The heating element is encased in a mica core, which ensures excellent heat transfer. The mica core is surrounded by strong shatterproof glass tubing, which adds to the heater’s longevity.  
  • Temperature setting: This UL-listed tank heater has a thermal safety button for the security of your little fish. When the sensor detects that the temperature of the water has surpassed the preset threshold, the thermal safety switch turns off the heating element. Power will be restored once the heater has reduced to a safe temperature. Now there will be no more fried fish.       
  • Listed in UL
  • Has superior heat transfer
  • Have thermal switch
  • Contain mica core
  • None

6. Finnex Deluxe Titanium Heating Tube

Category: Best titanium saltwater aquarium heater.

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Both fresh and salt water aquariums can benefit from titanium heaters. To use the heater, you’ll need a temperature controller (available separately). Finnex Heating Controllers or other 3 prong accepted controllers are suitable. 

  • Features: This is Finnex Deluxe Titanium Heating Tube comes with all the amazing features such as:
  • The super heating titanium also maintains a consistent temperature for your aquarium’s inhabitants and prevents temperature swings that irritate the tank’s inhabitants.
  • A heater guard is included into the titanium tube to safeguard the element from disasters and larger fish.
  • Material: Titanium heating tubes are nearly unbreakable and corrosion-resistant, making them suitable for use in both saltwater and freshwater tanks. The titanium casing will withstand damage that a regular heater would ordinarily face, and a plastic guard will assist keep other pieces of equipment and cattle from coming into direct contact with the heating tube
  • Temperature setting: The heating tubes in the Finnex TH series do not have any kind of temperature regulation. I recommend using a tank controller, such as the Neptune Systems Apex Aquarium Controller, or an external heater controller, such as the BRS Aquarium Heater Controller. 
  • Shatter resistant glass
  • Constant temperature
  • Heater guard is included
  • Great for saltwater tanks
  • No temperature controller.

7. Finnex Hang-On Electronic Controller Aquarium Heater

Category: Best immersible saltwater aquarium heater.

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The first immersible tank heater featured today is the Finnex Hang-On Electronic Controller Aquarium Heater. Now, I appreciate how it hangs from the back of the tank and includes all necessary installation gear. As a result, it’s simple to set up and doesn’t take up much space in the tank.  

  • Features: This Finnex Hang-On Electronic Controller Aquarium Heater comes with all the amazing features such as:
  •  Bare in mind that this heater’s motor is fragile, and it can’t be entirely submerged or it may disintegrate, perhaps shocking your fish.  
  • Aside from that, this is a good option to consider. Although the top part is susceptible to water damage, this heater is reasonably durable for an immersible heater.  
  • Material: Because the titanium tubes resist corrosion, they are essentially indestructible in both saltwater and freshwater aquariums.    
  • Temperature setting: Because of their small size, these ultra-quick heating tubes are easy to conceal. They also have a precise electronic control with a clip-on hook.  
  • Easy to mount
  • Perfect for saltwater as well as freshwater
  • Multiple power options
  • Good for smaller tanks
  • No fish guard included

8. JBJ True Temp Titanium Heating System

Category: Best luxurious saltwater aquarium heater.

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Another great submersible saltwater tank heater to add to your collection, this one is designed for large and even larger aquariums. There are five different wattage options: 150, 300, 500, 800, and 1000 watts. To put it another way, this item is incredibly powerful, and it can be used for some pretty large tanks.

  • Features: This has following amazing features such as:
  • Despite its modest size and ability to conserve space, it should not be utilized for small fish tanks. It consists of all of the necessary mounting hardware and may be installed vertically or horizontally, depending on your requirements.
  • While the guard isn’t the sturdiest, it will provide some safety for your fish from the heat source. 
  • Having said that, heaters like these are rarely as accurate as they claim to be. Keep in mind that this unit must be completely immersed, and it lacks adequate overheat protection.  
  • Material: It is made from plastic and can last you long time.  
  • Temperature setting: What’s interesting about the JBJ is that it comes with a remote temperature sensor and control unit, which is essentially a remote control that allows you to control it without having your hands wet. It has a large temperature range and operates quickly, not to mention the fact that it should be accurate to within 0.5 degrees Fahrenheit.    
  • Heating element is durable
  • Accurate
  • Completely submersible
  • Horizontal and vertical mounting
  • Heating guard is not durable

9. ViaAqua 200-Watt Quartz Glass Submersible Heater

Category: Best quartz glass saltwater aquarium heater.

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 This ViaAqua 200-Watt Quartz Glass Submersible Heater with Built-In Thermostat is a wonderful little heater to pair with it, a little 50-watt heater that’s perfect for aquariums up to 13 gallons.    

  • Features: It has following features:
  • Because of its low power, it will be unable to tackle any type of bigger tank. It should, however, work great for smaller tanks, especially those with hoods or canopies.
  • This device is also pretty simple to set up, since it comes with suction cups and can be installed either vertically or horizontally. 
  • I dig how versatile this device is, since it can be used in both freshwater and saltwater aquariums.  
  • Material: The quartz casing is fairly robust and shatterproof, so your fish should never be startled. In the event that it is not completely immersed, it has overheated protection.   
  • Temperature setting: This device has a temperature range of 68 to 93 degrees Fahrenheit; thus, it has a broad temperature range. However, it is not always accurate in terms of keeping a constant water temperature.
  • Comes in various power sizes
  • Versatile usage
  • Requires less space
  • Easy to adjust
  • The heating element is not durable

Also Read : 10 Best Hang On Back Filter For Saltwater

10. Aquatop Digital Heater 

Category: best saltwater aquarium heater with external thermostat.

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Aquatop has a number of tank heaters available, including several with digital displays that are either built into the heater or have separate heating controls.  

  • Features: This has following features:
  • The remote exterior thermostat control allows adjusting the temperature setting quick and easy without making your hands wet. The EX-Series from Aquatop is ideal for both freshwater and saltwater applications.   
  • Material: The EX Series Heaters have a small form that allows for a variety of positioning options and are exceptionally robust thanks to the built-in glass element.   
  • Temperature setting: The EX-Series of fully submersible digital heaters with external thermostat control is now available from Aquatop. 
  • Easy to install
  • Fully submersible
  • External temperature control
  • Sturdy
  • Inaccurate

Advantages of saltwater aquarium heater: 

Since many of us in the fishkeeping activity raise equatorial or saltwater fish, temperatures must be kept constantly between 75- and 80-degrees Fahrenheit (or 24 and 27 ° C). Most people seem to believe that because we maintain tanks indoors in our homes, the average temperature of our homes can keep our tanks at a safe temperature. Nevertheless, seasons vary, because there are days, like as in the winter, when temperatures in your premises might dip below 70 degrees or below, putting our valuable animals at risk.

The finest aquarium heaters not only keep your temperature steady, but they are also simply changeable, allowing you to change the temperature to what you require.


Well, that was a lengthy article. I look forward to being able to present you with enough details to make an educated purchase. As I previously said, there is still a reason why these tank heaters are on our best of selections; they each have a spot in your tank, based on your needs and money you can spend.

The Finnex HMO Titanium, on the other hand, comes close to matching to the best heater and does so at a significant savings. That, in my perspective, makes it the greatest saltwater aquarium heater. I’ve been a long-time Ehiem Jager consumer, so I’m not too sad that it didn’t win. It performed admirably in my review and has been of great service to me over the years. I’m probably going to switch to the Finnex HMA Titanium. Not only because it is quite accurate, but also because it is inexpensive. It’s inexpensive enough that I won’t hesitate to throw it away when I need to.


What Is The Best Way To Heat A Fish Tank Without Using A Heater?

You can heat your fish tank without using a heater in a few different ways. For starters, you may place it somewhere with plenty of natural light and illuminance. Since heat rises, you should keep it higher up. You may also use a tank led, which emits a significant quantity of heat. You may also cover the tank with a canopy or hood to preserve any heat in the water, or at least keep it from dispersing as quickly.  

For a 30-gallon tank, what power heater do I need?

A 125 or 150-watt heater should be plenty for a 30 gallons tank. Anything proportionately greater or smaller in capacity than that, on the other hand, will not be optimal.


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