🐠[TOP 10] Best Aquarium Heater for 75 Gallon Reviews

If you are looking for the best aquarium heater for a 75 gallon tank, there are several great options to choose from. However, before purchasing one it is important to know what size your tank is and how many gallons it can hold. Aquariums come in different sizes, so it’s important to make sure that you are getting the right size of heating equipment! A large aquarium will need a larger heater than a small one as well. If you’re unsure of which type of heater would be best suited for your needs, check out this blog post by Mem Fish experts on choosing the perfect heaters for any sized fish tank!

What is The Best Aquarium Heater for 75 Gallon

Orlushy Submersible Aquarium Heater Check Price on Amazon
Eheim Jager Aquarium Thermostat Heater Check Price on Amazon
VIVOSUN Submersible Aquarium Heater Check Price on Amazon
Cobalt Aquatics Flat Neo-Therm Heater Check Price on Amazon
Aquarium Heater Submersible Fish Tank Heater Check Price on Amazon
boxtech Aquarium Heater Check Price on Amazon
Finnex Digital Heater Controller Check Price on Amazon

Best Aquarium Heater for 75 Gallon Reviews

Orlushy Submersible Aquarium Heater

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When the wintertime is coming, it’s time to take precautions and prepare for your aquarium. To keep your fish tank warm during these cold months, we’ve created this Orlushy Submersible Aquarium Heater! This 300w heater can be used for tanks of 40-55 gallons or more and is 11 inches long so you can easily place it in any corner of your tank. Plus, with a cord that stretches up to 6ft long, there are plenty of options in finding the perfect spot for warmer water. With easy temperature adjustments between 68-86 degrees fahrenheit–it makes sense why a lot of professional greenhouses also use this device!

The Orlushy Submersible Aquarium Heater is the perfect product for those looking to maintain a pristine aquatic climate within a 1 degree range. With precise temperature dialing from 68 degrees Fahrenheit to 89 degrees Fahrenheit, you have enough difference in temperature that will allow you to keep your houseplants just as happy! Once again living up to our mission statement, “You can’t be too warm or too cool.”

With the Orlushy Submersible Aquarium Heater, you can finally set your aquarium water level to what is comfortable for your fish. The adjustable thermostat operates on a sensitive and reliable scale, shutting off automatically when the set temperature is reached. You don’t have to worry about that chilly evening plunge into the ocean again – whether it be from an overeager seal or just getting too close to some cold draft; this heater ensures that you can watch those loveable little finned friends of yours seemingly swim in delight!

Eheim Jager Aquarium Thermostat Heater

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The Eheim Jager Aquarium Thermostat Heater is a powerful and reliable aquarium heater. It’s fully submersible and thermo-safe for protection against dry out – which can happen when you are busy focusing on other aspects of your tank or not present. Start off with the temperature set to the desired setting via the TruTemp dial, then let this reliable heater regulate heating throughout your home or office while caring for your fish.

The EHEIM Jager Aquarium Thermostat Heater is a necessary piece of equipment for any aquarium. This high quality glass electric heater is designed to be resistant to both shock and shattering due to accidental events in your home or laboratory, making it an ideal option for anyone with kids or dogs in the house who might still want their aquarium around. The on/off indicator light makes it easy to know when your tank heating device is running without having to constantly guess based on feel alone.

VIVOSUN Submersible Aquarium Heater

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VIVOSUN’s Submersible Aquarium Heater is powered by an intelligent chip that precisely controls the temperature, keeping heat variation within Β±1Β°C/Β±2ΒΊF. The product has four different sizes and you can find your perfect heater with this high quality product. It is made of IP68 so it’s the safest heating system available on the market and VIVOSUN guarantees your safety as well as quality. So get one of their products for your aquarium needs today!

The VIVOSUN 100W Submersible Aquarium Heater is really easy to install, even without being an electrical engineer. The desired temperature can be adjusted with a touch of a button. Moreover, if you need some relief from too-warm water because you’re worried about your pet fish’s health or just want to enjoy a respite from the scorching summer heat, simply turn off this submersible heater – it’s not waterproof! This particular product is suitable for aquariums up to 31.7 gallons in volume

Get your aquarium thriving with the VIVOSUN Submersible Aquarium Heater, and say goodbye to cold water tanks. This heater features UL certification on its plug for use in US homes, comes with a UL-verified power cord that prevents any accidents due to electricity contact, and provides optimum heating of freshwater and saltwater tanks up to 500 gallons. The heater has been certified by CE, FCC, and ROHS organizations as well as followed the strict UL guidelines while producing this appliance!

Cobalt Aquatics Flat Neo-Therm Heater

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The Cobalt Aquatics Flat Neo-Therm Heater provides accurate, one-touch tank heating for your Aquarium or terrarium. The neo-therm electronic thermostat maintains the temperature to within +0.5Β°F with a simple press of the button; LED display indicates both set temp and actual temp simultaneously, is fully submersible and has an attractive modern design perfect for energy efficient homes!

Upgrading your aquarium is easier than ever with Cobalt Aquatics Flat Neo-Therm Heater. This high quality heater takes the hassle out of staying on top of your maintenance and offers consumers a variety of benefits, such as: safety & reliability – neo-therm automatically shuts down if left on too long; virtually indestructible – heaters will not crack or break; perfect size for every tank and last but not least it’s made in Poland!

Your fish will beat their fins with excitement when they see your new Cobalt Aquatics Flat Neo-Therm Heater. You’ll be the coolest pet owner all of school once you bring this sleek heater home and warm up your aquarium! Let’s get started. First we need to find a place for our neo-therm, so let’s measure it out and make sure there is room in your tank for the device. It’s important that you don’t leave any space on the sides or top of the tank, since those are places where heat can escape if left uninsulated by water. In order to maximize performance from our neo-therm we want to position it near an edge or corner, usually one about halfway down.

Aquarium Heater Submersible Fish Tank Heater

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This titanium heater from Aquarium Heater Submersible Fish Tank Heater is an amazing investment that you don’t want to pass up. This heater is accurate with readings and heats your tank no matter the size. The led light makes it easy to read and adjust without having to stick your hand in the water, which we know can be risky. Take a step up from the basic old fashioned heating system with this quality product today. It will make tank keeping much easier for you, so don’t hesitate!

The seaELF aquarium heater is made with premium titanium alloy, shatterproof, anti explosion and anti cracking. Easier to use, this water heater has a precise temperature probe on top for pinpoint accuracy and double seal design for security. Available in both freshwater and seawater-compatible designs with CE, RoHS & FC approval as well as UL (US) approved plugs.

boxtech Aquarium Heater

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The boxtech Aquarium heater is a convenient on-the-go placement option for your tank. Ideal for tanks 55 gallon or smaller, the 4200 hours of running time and 300 watt power will keep your fish warm enough in any cold weather condition. The specially designed cover ensures safety from accidental burns while preventing pets’ hair from combusting which washes away bacteria that can damage the thermometer and reduce the accuracy in readings over time. In addition, the aquarium heater has an easy to read display with blue backlighting rather than inflexible digital lines so you know what temperatures are suitable for different species at a glance! Plus, this device has an automatic balancing system no matter how hot it gets

The boxtech Aquarium Heater will ensure your fish stay toasty, warm and safe in their elitist glass-walled homes. This heater is designed for maximum safety with UL-Approved Power Cord, Controller IPX4, and Quartz Tube Safety Protection that is shatterproof, explosion proof and prevents electricity leakage. What’s more? The product lasts 3 years or more! You can trust the boxtech Aquarium Heater to safely keep your pet happy and healthy all year round.

Finnex Digital Heater Controller

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If you’re worried about your water temperature slipping below what you want during the night, don’t fret. The Finnex Digital Heater Controller is designed to fix exactly that! It all starts with a sleek titanium heater and a large dial on the body which controls levels of power going to it. You can set this anywhere from 0F (that’s Fahrenheit by the way) up to 99F so every level of heat emission is accounted for. What’s even better? The accuracy of this thing never misses more than 2 degrees of difference, meaning you won’t be ever too hot or too cold any time soon.

Keep your aquarium tank warm with the only digital controller on the market. With a three power receptacle, you can plug in our 300W, 500W and 800W heating tubes or other brand’s heating element. You’ll never need to worry about turning off your heater again as it will switch off automatically when the desired water temperature is reached up to 80 Gallons.

Types Of Aquarium Heaters

1. Submersible Heaters

A submersible aquarium heater is an aquatic heater that is placed inside the aquarium and heats water through immersion in it. It as a thermometer attached or separate to measure temperature of water. They are very popular among hobbyists, both beginner and advanced due to their ease of use and low risk of overheating the water.

2. Immersible Heaters

An immersible aquarium heater is a specialized device which is mounted in the aquarium but does not heat water. It transfers unused heat to water and make it more comfortable for fish to live in the environment. They are also called “passive” heater.

3. Inline Heaters

Inline aquarium heaters are a type of heater which is very convenient for fish keepers because they should be connected directly to the aquarium’s water supply line (pipe). They do not require any additional equipment and easily be inserted into the existing plumbing or can be attached to any new one. But because it is a heat exchanger, it will be necessary to install another heater in order to maintain the desired temperature. An inline aquarium heater is suited for large tanks which are more than 200 gallons (760 liters) and require additional heating all around the year, especially during colder seasons.

4. Substrate Heaters

A substrate heater warms the ground of the aquarium, which keeps cold water in the tank from cooling down. They are very efficient for tropical fish that like warmer environment and spend most of their time on the bottom of the tank. However, it is not recommended to use substrate heater for fresh-water marine fish because they prefer cooler environment and sometimes seek refuge near cooler areas in an aquarium.

5. Heating Elements

A heating element or heat cable is the simplest form of aquarium heater. It is a long coiled wire which can be mounted under the aquarium’s substrate to transfer heat to the ground and also maintain constant temperature in water. But it may not work properly in cases where there is high risk of external damage to the unit.

Buying The Best Aquarium Heaters: Factors To Consider

1. Size Matters

The size of an aquarium heater is measured in watts. The size of a tank can vary from as little as five gallons to several thousand gallons, all depending on the needs and preferences. A bigger tank would require a larger power capacity to heat water at a desirable temperature for the fish to thrive well inside it.

2. Type Of Heaters

There are many types of aquarium heaters available in the market. Each type has its own benefits and disadvantages that should be taken into consideration when deciding which one to buy for a specific tank.

3. Budget

The cost of an aquarium heater varies from as low as $10 up to several hundred dollars, depending on the kind and power capacity of the unit. Some depend on heat up time to determine their price, while others are priced according to the materials they are made with.

4. Easy To Maintain

Although aquarium heaters can be very reliable and cost-efficient in many ways, it is also important for fish keepers to see how easy it will be to maintain the unit in good condition.

For example, a heater that is too big for the tank will need constant monitoring to avoid overheating of water, he should replace it with small and more power efficient aquarium heater. Furthermore, some heaters tend to produce noise during operation which can be very disturbing when fish are sleeping at night or there are guests around during a day.

5. Automatic Or Manual Control?

Almost all aquarium heaters have two temperature settings which can be manipulated through manual and automatic control, depending on the user’s preference. Some fish keepers prefer having an easy way to adjust temperature while others like using slow heating process for their fish to adapt gradually with changing environment in the tank.

How To Install Aquarium Heater:

Aquarium heaters have to be placed inside the aquarium in order for them to work. If your tank is not equip with a heater, then you would need one that can be attached or put below the water line of the tank. This is where inline aquarium heaters come into play because they are specifically made to heat the water inside an aquarium.

Inline, or submersible, aquarium heaters are always placed under the water level of a tank and submerged in the tank’s water for them to function properly. They are also the simplest kind of heating equipment an aquarist can use because they require no additional setup before or after placement in a tank.

These heaters also come in different sizes, so if you have a smaller tank (up to 30-40 gallons) then you can always use the smallest ones, which should be enough for your aquarium. They are usually made of glass or plastic and the glass versions have a sealed plate on the bottom that prevents them from letting water into it. For safety purposes, you should always read the user manual before installing aquarium heaters.

Here are some instructions to better guide you in installing an inline heater:

Step 1 : Let’s say that you already have your preferred aquarium heater and now all you need is a hole in the water line of your tank. If not, then be sure to purchase a hole saw that will fit in the line and its surrounding area. This will allow you to easily cut out an opening for your new heater.

Step 2: Next, find the right size of piping (flexible tubing) that is long enough to go from one side of the tank to another without any problem. Follow this by making two cuts on each pipe for a total of four cuttings. Once you have the pipes ready, place it around the tank and then lower your heater into it while making sure that all of its wires are safe from getting pinched under the weight. Be careful not to doze off because if any part of your material gets trapped under your heater, it might get damaged.

Step 3: Once the heater is securely in place, run your wires using silicone tubing to hide them and make sure that they don’t come into contact with any metal part of your tank or anything else.

Step 4: Add some water inside each pipe and if it doesn’t reach the opening of your filter then you can use a water pump to make sure the heater is always submerged in the tank’s water.

When your inline aquarium heater has cooled or warmed as you have set it, then it will not turn off even if power supply is interrupted for as long as 24 hours. As such, you will need to wait for it to automatically go off before removing it from the tank’s water or disconnecting it entirely.

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Frequently Asked Questions:

1. What size heater do I need for a 75 gallon aquarium?

The size of a heater for a 75 gallon tank depends on how large the tank is. This will then determine if you need to use a 300, 400 or 500 watt model, as these are the most common sizes that one can find in the market today.

2. What is the best heater for a 75 gallon aquarium?

That would be the one with the most advanced technology that is specifically made for your tank size and type of fish. Most often, people usually ask this question when choosing between an electrical and a submersible heater but they forget to consider other factors like power consumption, price, special features available on their model and much more. That is why it would be best to consider the three factors above when making your choice.

3. How long does it take to heat up a 75 gallon tank?

This would depend on how large is your tank and the kind of heater that you are planning to use. Inline aquarium heaters normally take about 24 hours when you set it at its lowest setting but can be shortened to 6 hours if you have it set on its highest setting.

4. What is the best aquarium heater to buy?

The best one for you is the one that has all of your needs and requirements taken into consideration, as this will make sure that you are getting everything that you need from a heater for your tank without having to spend extra money on something that you don’t really need.


There are many good aquarium heaters on the market, but these five seem to be among the best. You can’t go wrong with any of them and each has their strengths that make them stand out from one another. The Marineland Digital Heater is a great option for people who have fish that need a high water temperature or those who want more control over setting it upβ€”it’s got both manual controls and an app! If you’re worried about your tank heating up too much (or not enough!), then take a look at the Tetra Submersible Aquarium Heater; it gets warm quickly without warming up your room first. For something easy to use, we recommend going with either Orlushy Submersible Aquarium Heater.