Best Aquarium Heaters for 75-Gallon Tanks

9 Best Aquarium Heaters for 75-Gallon Tanks for 2023

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If the colorful tropical fish in your aquarium are fond of toasty water, it’s definitely a good idea to get the best aquarium heater for your 75-gallon enclosure. However, let’s not forget that these heaters are prone to fail, so you need to do some good research before getting one.

With so many options online in terms of brands and models, it is easy for someone to get confused when looking for the best aquarium heater. To ease your stress levels and make your decision-making process quicker and easier, our review team has done the hard work for you.

We have spent hours reviewing and comparing products to each other to find the most suitable ones to recommend. After careful research and analysis, we have handpicked 9 of the best aquarium heaters for 75-gallon tanks for 2022. Read on to find the complete reviews of each product.

If you are in a hurry and do not have the time to read until the end, we simply suggest that you go with our editor’s choice: the Orlushy Submersible Aquarium Heater (see Amazon) . This is an easily adjustable heater that comes with a knob thermostat, two suction cups, and a free thermometer. It is suitable for both marine saltwater and freshwater environments.

Product NamesControl RangeFit for aquariumPower
#1. Hygger 500W Aquarium Heater61 to 90°F 60-120 Gallon500WSee price
#2. Fluval E300 Advanced Electronic Heater68 to 93°Fup to 100 Gallon300WSee price
#3. Orlushy Submersible Aquarium Heater68 to 89°F40 to 75 Gallon500WSee price
#4. HiTauing Aquarium Heater63 to 94°F60 to 120 Gallon500WSee price
#5. hygger 500W Titanium Steel Aquarium Heater70 to 94°F60 to 120 Gallon500WSee price
#6. HITOP 300W 500W Digital Aquarium Heater60 to 93°F60 to 150 Gallon500WSee price
#7. Aquatop 500 Watt Titanium Aquarium Heater68 to 92°Fup to 150 Gallon500WSee price
#8. hygger 500W Titanium Aquarium Heater32 to 104°F60 to 120 Gallon500WSee price

#1. Hygger 500W Aquarium Heater

The first product on our list is the Hygger 500W Aquarium Heater, a fully submersible aquarium heater that enables memory function as well as protection from overheating. It comes with features such as an auto shut-off for when the heater overheats, and then it resets once it cools down.

Made with premium quality quartz and securely double-sealed thanks to a protective guard, this aquarium tank heater is resistant to both corrosion as well as any explosive events. It protects your fish and any other underwater lifeforms you may be housing from scalding and any other potential heater-related injuries. It also includes an easy-to-read LED screen that shows you the real temperature of your aquarium’s water.

The heat indicator lights light up red when the aquarium heater starts heating, and they turn yellow when your tank’s water reaches the set temperature. All you need to do is simply press the ‘Set’ button to achieve the desired temperature. It blinks for three seconds and then starts to function.

Product features and specifications

  • 100% waterproof & fully submersible
  • Double-sealed
  • Easy-to-read LED digital display
  • Ideal for use in freshwater aquariums
  • Protection from overheating
  • Built-in external IC temp controller
  • Easy-to-set temperature

User/Customer Reviews

Those who have used this heater are full of praise for it as they feel that the quality and performance of the aquarium heater are on par with its rivals. Many people have also appreciated the customer care and service that are very responsive whenever there have been any questions or concerns. A few customers have warned that the suction cups are not the greatest quality and could be improved, though.


The Hygger 500W Aquarium Heater is a well-built product with a slight suction cup flaw that can be better. Otherwise, it does an excellent job as promised and delivers good value for the price. The brand also has a very good customer service team for those who have any questions or problems with the heater. Overall, we feel that this aquarium heater is more than what you would expect at this price.

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#2. Fluval E300 Advanced Electronic Heater

The next heater is the E300 advanced electronic heater from Fluval, and it is designed with dual sensors to monitor your tank’s temperature to give you real-time, accurate readings. It also comes with an LCD display that provides the temperature readings in both Celsius and Fahrenheit, alerting users via color codes if the temperature fluctuates too greatly.

This heater features fast-heating technology and comes equipped with a fish guard as well as a safety shut-off feature to keep all of your aquatic pets safe in the aquarium. It comes with a narrow mounting bracket that provides a slim profile within the tank, and it also has a color-coded system for easy viewing of any alerts regarding significant temperature changes.

This E-Series digital heater also features dual-sensor VueTech microprocessor technology that gives you accurate water temperatures while also alerting you about any fluctuations. The precision temperature control allows increments of 0.5 degrees for maximum control over the aquatic environment. It is designed to work perfectly in aquariums of up to 100 gallons.

Product features and specifications

  • 300W heater
  • Displays water temperature digitally
  • Dual-sensor VueTech microprocessor technology
  • Precision temperature control
  • Integrated fish guard protection
  • Slim mounting bracket
  • Can be used in freshwater and saltwater aquariums

User/Customer Reviews

Those who have bought this aquarium heater have said that it was a little tough to set it up at first, but once that was done, it worked great and was worth the extra costs. People have also mentioned that it successfully maintained the water temperature within the desired range. A few customers have warned that the light is slightly dark if it’s in a dark room.


The Fluval E300 Advanced Electronic Heater (see Amazon) is slightly expensive, but if you are ready to invest in your large aquarium, you get more value than you could ask for when purchasing this particular product. It is extremely user-friendly and does an amazing job at maintaining the aquarium’s water temperature. Overall, we feel that this product offers an excellent price to performance ratio.

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#3. Orlushy Submersible Aquarium Heater

Orlushy is a well-known brand thanks to its pursuit of excellence in terms of innovation and optimizing its products. They are committed to offering each aquarium enthusiast stable and high-grade aquarium supplies. This submersible aquarium heater from their brand is next on our list, and this heater can be used by both novices as well as advanced aquarium enthusiasts.

We love having the ability to adjust the aquarium fish tank heater exactly as per the tank’s inhabitants’ requirements, and this reliable thermostat helps in maintaining a uniform temperature throughout as well. The shut-off function automatically shuts down the heater when the desired temperature is reached, avoiding overheating and danger to your aquatic friends.

With a heating capacity of 500W, this aquarium heater with a 6-foot power cord is perfect for 40- to 75-gallon aquariums. It is comprised of explosion-proof, 2mm, thickened quartz glass, which makes it suitable for use in both freshwater and saltwater aquariums. You can also easily hide this heater in the fish tank, so the environment will look fantastic even with the device installed.

Product features and specifications

  • Measurements: 13-inch length
  • Weight: 1.1 lbs.
  • Extra thermometer included
  • 6-foot power cord
  • Suitable for 40- to 75-gallon aquariums
  • 2mm thickened quartz glass
  • Precise temperature dial
  • Ideal for freshwater and saltwater tanks

User/Customer Reviews

Several people who have used this heater have said that it takes some time to get adjusted, but after that, it performs well and the temperature also becomes accurate. Users have said that the suction cups also work great. A few customers have warned that the temperature usually stays about five degrees off from what it is set to, so you will need to adjust the settings accordingly.


The Orlushy Submersible Aquarium Heater is a sleek and slender aquarium heater that is 100% submersible and should be installed on the inside of the fish tank. It works wonderfully for both freshwater and saltwater aquariums. Overall, we feel that this product delivers a solid performance, making it a great choice.

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#4. HiTauing Aquarium Heater

The HiTauing Aquarium Heater features an intelligent sensor system to monitor both water level and temperature to ensure that the heater stops heating when certain requirements are no longer met. It also ensures the maximum safety of both the user as well as the tank’s aquatic inhabitants with an indicator light that turns on if the water heats up beyond the set temperature.

This heater includes a digital LED display controller that shows the water temperature in both Fahrenheit and Celsius depending on the user’s preferences. The display settings can be switched as needed by pressing and holding the buttons for a few seconds. To set the correct temperature for the heater, you’ll simply need to press the button multiple times until the desired number has been reached.

This heater features a tube made of high-grade quartz glass that is both sturdy and safe from the risks of overheating. It is suitable for both freshwater and saltwater aquariums, too. It also comes with a durable container that serves as effective protection to prevent any scalding of aquatic life as well as ensure the safety of the users themselves.

Product features and specifications

  • Measurements: 12.99 inches long
  • Weight: 1.46 lbs.
  • 500W aquarium heater
  • Strong suction cups
  • Overheating protection function

User/Customer Review

Most people are impressed by the fact that this product works as advertised and maintains the tank temperature accurately. Users have also mentioned that the digital readout is great and the suction cups hold up really well. A few customers have warned that the automatic shutdown feature did not work as expected for them and that the plastic protective guard melted, so you need to be careful regarding those two aspects of the heater.


The HiTauing Aquarium Heater is a beautifully-designed submersible heater that works as advertised and expected. It does an effective job at heating the water, and the outer casing ensures that fish do not touch the heater. Additionally, you can adjust the temperature from the outside of the tank for convenienve. Overall, we feel that this heater offers a good bang for your buck.

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#5. hygger 500W Titanium Steel Aquarium Heater

This titanium and steel aquarium heater comes from Hygger as well, and we love it for its “Eco Heating Mode,” which means it only runs when the water temperature drops and needs to be reheated to the proper temperature. As an energy saving heater, it takes only about 3 minutes to heat 3.5 gallons of water.

For your own safety as well as the safety of the fish residing in your tank, this heater also features an auto-shutoff function that kicks in when the water overheats or the heater is not entirely submerged all the way. Using the heater is easy, too, as you only need to simply press a button and set the right temperature.

The sturdy and durable titanium steel heating element is covered by a plastic guard that is just as durable and can last for nearly 3 years or longer. It can be used in both freshwater and saltwater tanks, too. There are two strong suction cups on the clip to hold the heater in place, so you’ll never have to worry about it slipping or falling.

Product features and specifications

  • Measurements: 7.9 inches long
  • Weight: 2.57 lbs.
  • 2 heating modes
  • 500W and 800W models
  • Titanium steel composition
  • Built-in thermometer
  • LCD display on the thermostat controller
  • Auto-shutoff mode if overheating occurs
  • Dual digital displays on the controller

User/Customer Reviews

Those who have used the heater have said that it’s certainly one of the best you can buy thanks to functions that actually help you do the work with ease. Although the heater is slightly big and bulky, it still gets the work done and is easy to work, too. A few users have also said that the heater has a solid customer service team and a great warranty that backs the product up in the event of any problems arising.


The Hygger 500W titanium steel aquarium heater (shop now) is a reliable product that offers accurate temperatures and also helps in adjusting your tank’s temperature with ease. Setting it up is easy, and if you find it challenging, there are many YouTube videos available to help you. Overall, this product offers a good value for the money.

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#6. HITOP 300W 500W Digital Aquarium Heater

Next, we have this 500W digital aquarium heater from HITOP, and it works best for 65- to 150-gallon fish tank. It is comprised of a nickel-chromium alloy heating element that is significantly resistant to corrosion and provides stable temperatures. This reliability ensures durability as well as a longer service life.

This heater also features a dual LED temperature display that shows the set temperature along with the real-time water temperature for you to observe any changes in the water that may be taking place. It includes an internal high-efficiency temperature sensor as well that works accurately to detect the water temperature at all times.

There is an external component that allows you to adjust the temperature both safely and conveniently. It also comes with a removable protective cover for easy cleaning and a detailed manual. The manufacturer stands behind the product with a 12-month warranty, too.

Product features and specifications

  • Measurements: 10.6 in. x 2.8 in. x 1.2 in.
  • Weight: 1.54 lbs.
  • Uses high-efficiency heating materials
  • External temperature controller
  • Dual digital temperature display
  • Removable protective cover
  • 12-month warranty
  • Works in both freshwater and saltwater aquariums
  • Accurate temperature control

User/Customer Reviews

People who have used this aquarium heater are full of praise for the product as it comes with an easy-to-read digital display, making it easy to ensure that you have accurate temperatures in your fish tanks. Many users have said that it works best for 75-gallon tanks, and you only need to set the temperature and leave it to get the job done. A few customers have warned that the suction cups included with this heater are rather weak, though.


The HITOP 500W digital aquarium heater can be easily installed horizontally or vertically, or it may also be placed at the bottom of the tank. You will need to make sure that the heater is completely submerged in the water for accurate temperatures and proper use. It comes with a long cable wire and external temperature controller to keep it user-friendly and convenient. Overall, this aquarium heater is everything you could wish it to be.

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#7. Aquatop 500 Watt Titanium Aquarium Heater

Aquatop’s fully-submersible, 500W titanium aquarium heater features a compact design that works well in a variety of environments. Courtesy of its sturdy construction of the heating element made of titanium, it’s incredibly durable as well. It maintains temperatures ranging between 68°F and 92°F, and individual probes on each unit allow for accurate temperature readings.

This aquarium heater comes with an easy-to-read temperature indicator, and the temperature accuracy provided is also good. However, you may need to sometimes fine-tune the settings based on your specific fish tank. The heater also comes with a remote sensor to help you keep track of the temperatures with ease.

The heater’s controls are outside of the tank, which makes them very convenient to use. It is easy to maintain your tank’s ideal temperatures with the various features provided by this heater and its accessories. Additionally, the unit also works great with APEX controllers, for those who use these, when it comes to turning the power on and off and when the heat needs to be adjusted.

Product features and specifications

  • Measurements: 15 in. long
  • Weight: 15.84 oz.
  • Temperature range: 68°F to 92°F
  • Easy-to-read temperature indicator
  • Remote sensor for accurate temperatures
  • Ultra-tough titanium construction
  • Works in both freshwater and saltwater aquariums

User/Customer Reviews

Several users have commented that this is a heater that is easy to set up and use, even with the unit being completely submersible. Some people have said that the heater is only off by a few degrees from the desired temperature that it’s set to, but it can be adjusted. A few customers have warned that you might need an external probe, too.


The Aquatop 500W titanium aquarium heater looks great and works great to keep water warm and comfortable for your fish. So, even when the temperature of your house dips, this heater keeps the temperature steady inside of your aquarium and within the desired range that your fish prefer. Overall, we feel that this aquarium heater is reliable and well-built to give you good results.

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#8. hygger 500W Titanium Aquarium Heater

The eighth item on our list is yet another digital submersible aquarium heater from Hygger, and it works great for both saltwater and freshwater tanks. It is most suitable for 60-gallon to 120-gallon fish tanks and comes with 500W of power for great heating. This 12.3-inch-long heater rod is the perfect size for ease of use as well as safety.

After you carefully install the wall aquarium heater and the separate thermometer, you will need to set the thermometer to the desired temperature. The rod will stop heating the water in the tank once the set temperature is reached. It automatically restarts the heating process whenever the temperature falls even one degree lower than the set temperature.

This titanium aquarium heater is compactly designed, making it perfect for use in small fish tanks. You can hide it easily, so it keeps your tank’s environment looking natural and appealing. The IC temp controller also displays the set temperature and the current water temperature at the same time, and an indicator light shows the current heating status.

Product features and specifications

  • Measurements: 12.3-inch length
  • Weight: 2.01 lbs.
  • Works for fish tanks between 60 to 120 gallons in size
  • Fully automatic control
  • Durable titanium tube
  • Digital LED display
  • Wide temperature range

User/Customer Reviews

Those who have used this heater have said that the product is reliable and easy to set up and install. Users have also said that the product is consistent in its performance without any wild temperature swings. A few customers have noted that the suction cups are good enough but could potentially be a bit better.


The Hygger 500W titanium aquarium heater is a lightweight, durable, and corrosion-resistant unit designed especially for marine saltwater tank use, but it can also be used in freshwater tanks. It is easy to set up, and controlling the temperature is a breeze. Overall, we feel that it offers a good value for the money.

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#9. hygger Saltwater Tank Titanium Tube Submersible Pinpoint Aquarium Heater

Last, but not least we have the final Hygger submersible aquarium heater that comes with two suction cups for reliability when it comes to staying in place. This heater comes with a separate controller that allows you to easily adjust the tank temperature from low to high without even taking the heater out of the water.

This heater is also shatterproof as it is only made from high-quality titanium. Due to its anti-corrosion features, the unit is perfect for use in freshwater tanks, saltwater aquariums, and even reef tanks. The makers suggest that you keep the heater near a strong water flow so that the entire aquarium stays at a constant temperature.

There is a built-in external electronic thermostat with a dual LCD display that clearly shows the temperature settings in either Celsius or Fahrenheit, depending on your preference. When the temperature reaches your desired settings, the 500W aquarium heater stops heating and shuts off automatically. This heater works best for aquariums with a capacity of 60 to 120 gallons of water.

Product features and specifications

  • Measurements: 12 inches long
  • Weight: 2.01 lbs.
  • IP68 (100% waterproof)
  • Fully submersible
  • Accurate temperature control
  • Suitable for freshwater and saltwater tanks
  • Titanium tube with shatterproof construction
  • Corrosion-resistant
  • Easy-to-read LED digital display

User/Customer Reviews

Those who have used this product have said that it lasts a long time and does a great job at achieving the desired temperature within the tank and keeping the temperature constant and only 1 to 2 degrees off, which is okay in most cases. People have also said that they have amazing and responsive customer service that takes care of any issues immediately. A few users have warned that the suction cups are not as good as expected, though.


This Hygger submersible pinpoint aquarium heater is an excellent product that is easy to operate and set up. It comes in four different sizes, which helps to create suitable water conditions for your fish to thrive in tanks up to a capacity of 120 gallons. Overall, this product is one of the best aquarium heaters for 75-gallon setups.

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Buying Guide: Best Aquarium Heater for a 75-Gallon Tank

Now that you have gone through the reviews of the 9 best aquarium heaters currently available, you probably have a good idea about the one you want to choose. You may still want to shortlist and narrow down your selection, though. For this, we have created a buying guide comprised of the things you need to consider before purchasing one if you aren’t 100% sure.


You will need to select the wattage depending on your aquarium size, and this may range between 10W up to 500W. This is based on the whole aquarium and not just the heat output. Thus, you need to make sure that you buy a heater that has the ability to properly heat the entire fish tank and maintain the temperature constantly without dropping.


You need to be very particular about the function of the heater you choose because if it does not work correctly for the specific environment within your tank, it may become a complete nightmare for you. So, depending on how sensitive your fish are, you need to look for a heater that has more intricate functions for very specific cases. Any malfunctions can cost you the lives of an entire tank full of fish.


The good news is that most of the aquarium heaters available in the market are fully submersible, so you do not have to worry about that issue in most instances. However, it’s always a good idea to read the product description of any heaters and choose the one that lets you submerge the heater fully for a complete heating effect throughout the tank.


You will also need to look into certain features of the heaters that make them more attractive and functional at the same time. Such features include having well-made heater cores and including construction materials that ensure that the unit lasts for a long time. You must also make sure that you check all the specifications before purchasing.

Some of the products may have LED lights that display the temperature or have a shatterproof casing to ensure safety. So, you will need to read the product description and specs to find the product that best suits your needs.


Again, it is very important to choose the right size heater for your aquarium. If it is too small, it will not be able to maintain an accurate temperature, and you will also need to run it constantly which means it may wear down quicker than usual.

Simple logic should tell you that a heater that works for a 30-gallon tank will not work for a 55-gallon tank. Heaters come in various options that are defined by wattage. If the wattage is higher, the heater will be more powerful. There is also a basic formula of 3W-5W per gallon, which means 2W-3W per liter, when you’re trying to calculate the right requirements.

To get a good idea of the exact size of the heater you need, you simply have to know the volume of your tank and the number of degrees of which you’ll need to raise the water temperature.


Now, let’s talk about the adjustability required when it comes to adjusting the temperature settings on your heater. While most of the high-end heaters out there allow you to adjust the settings with ease, some of the units come with an already set temperature that you cannot change. This is something you’ll need to check for before purchasing a heater for your aquarium.

Controls Access

You must make sure that the heater has an easily accessible control knob to adjust the heater underwater or else it can become a very frustrating process. So, look for something that is easy to grab and twist while the heater is submerged. Some of these heaters feature external controls which make the adjustment process far easier.

Temperature Readability

The best heaters come with a numerical temperature gauge that lets you view the set temperature easily. However, please bear in mind that this may not always be accurate, so it is always a good practice to have a thermometer with you as well.

Safety Features

To ensure your safety as well as that of others, you must make sure that the heater is fully submersible. While most of them are, it is always best to make sure, just to be on the safe side. Another good safety feature is the automatic shut-off feature that turns the heater off when the water level goes too far down or the temperature of the tank becomes too high.

Another safety feature worth looking for is a light indicator, which means that the heater has a light that indicates when it is on and actually heating. This helps you to keep an eye on the heater and constantly monitor it, too.

Benefits of an Aquarium Heater

As most people who have a fish keeping hobby usually keep tropical fish or saltwater fish, these individuals need to maintain their water temperatures in a constant range of 75°F – 80°F.

As aquariums are mostly kept indoors, many people think that the room temperature at home can keep the aquariums at a safe water temperature. However, this is not the case.

When the weather changes with the seasons, such as in winter, the room temperature can drastically drop. Sometimes, it may even go below 70 degrees or more, putting the lives of the aquatic beings at risk as they are not attuned to handle such temperature changes well.

The best quality aquarium heaters out there not only keep the temperature up for your tropical fish but also help you adjust the heat exactly as needed to maintain the best possible temperature for your fish. Some models may even come with a separate temperature controller to let you add manage the temperatures in the event that the heater fails.

Related Questions

How often should you replace aquarium heaters?

The ideal scenario should be that you never need to replace an aquarium heater, but this rarely happens. In the real world, most people tend to change the heater only when it fails. This is typically when it has led to some disastrous results. Hence, we suggest that you always keep a check on the condition of the heater and replace the unit every 2 years as a preventative measure. Alternatively, you may invest in a high-end heater that stays good and functional for life.

Do aquarium heaters consume a lot of electricity?

Yes. Unfortunately, aquarium heaters consume a lot of electricity compared to other electric equipment. To save on energy costs, you may consider keeping the aquarium in a well-insulated room or maintaining a higher temperature indoors at home. In warmer climates, this might save you some costs as the A/C won’t affect this very much. In the winter months, you may consider keeping the home at 78 degrees to keep the heating costs down.

The bottom line is that if you love your colorful and shiny tropical fish, investing in a great-quality aquarium heater is a small price to pay to ensure that your aquatic pals keep swimming and playing around the fish tank healthily and happily.