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Best Aquarium Heater Reviews of 2017

When you want your fish to stay warm and healthy, an aquarium heater is the essential gadget you need. If you’re having doubts about choosing the right product, we are here to help.

aquarium heaters

Best Aquarium Heater Reviews of 2017

When you want your fish to stay warm and healthy, an aquarium heater is the essential gadget you need. If you’re having doubts about choosing the right product, we are here to help.

Fish don’t require too much attention, and your home is cozier and prettier with them. However, if you want to keep your little pets safe and comfortable, you should have a good aquarium heater. We have chosen several top rated aquarium heaters for you, and we hope our reviews and buying guide will help you make an educated purchase.

Top Rated Products on the Market

aqueon pro heater


  • Dimensions: 4 x 12.5 x 2 inches
  • Watt: 50
eheim jager heater


  • Dimensions: 1.4 x 9.6 inches
  • Watt: 50-300
cobalt aquatics heater


  • Dimensions: 9.8 x 2 x 1 inches
  • Watt: 100
Finnex Electronic Heater


  • Dimensions: 14.5 x 1 x 1 inches
  • Watt: 100-500
hydor external heater


  • Dimensions: 4 x 4 x 12.5 inches
  • Watt: 200-300


Most Popular Product

aqueon 50W pro heater review


• Easy to attach on your aquarium

• Monitor power light

• Adjustible heat

• It works for freshwater and marine fishtanks

• It shows when is heating


• It may rust
• Some complaining about thermostat not working properly

Aqueon Pro Heater comes in five different wattages. You can find it in: 50 Watts, 100 Watts, 150 Watts 200 Watts and 250 Watts. It is very easy to set up, because of its suction cup that can be attached anywhere in your aquarium.

One of its unique features is the monitor power light which helps you control its energy level. With an electronic thermostat and an aluminum core, you can easily adjust and monitor the water temperature.

It has a special red light to let you know when the water is heating. And when it reaches the set temperature the turns to green. One of it’s safety features is shatterproof plastic and auto turn off when it is out of the water.

Don’t worry about removing it from the aquarium, when it is placed back in the water, it will automatically restart. Just make sure to follow the instructions that comes with it before turning it on.

Some users have complained about the thermostat not working properly.

EHEIM jager aquarium thermostat heater review


• Adjustable temperature
• Retro design
• Monitoring indicator
• Shock resistant and special shatterproof glass
• TrueTemp system


• Some complain TruTemp system not working properly
• Not easy to setup

This more powerful older looking product is fully submersible. With its new features such as shock resistant and special shatterproof glass, it will work ideal for both small and big sized aquariums. Dimensions are 1.4 x 19.9 inches and 11,5 ounces. It comes in six different wattages: 50 Watts, 75 Watts, 125 Watts, 150 Watts, 200 Wats and 250 Watts.

It will automatically turn itself off when the liquid level gets too low. That way you will avoid some electrical or fire problems, so your fish could be safe. Its unique feature is a TruTemp dial that will recalibrate the heater for the sufficient temperature.

This helps to keep the fish tank water temperature constant. It may have an older, retro look, but it includes new automatic temperature regulation. That means when it reaches the specified heat it will automatically turn off, preventing overheating.

Just set it on the desired heat and  relax. With its monitor on/off light, you can quickly check is the heater working.

Some users have complained about TruTemp system not functioning properly. So, keep an eye on him for a while.


Most Accurate Thermostat

cobalt aquatics neo therm heater review


• Flat design
• Ultra-accurate electronic thermostat
• For up to 29 gallons tank
• LED display
• thermal protection system
• Fully submersible
• Shatterproof casing
• Easy to set


• Some complain about durability and electricity failure

Well, this product is an excellent choice to make. One of its primary features is a modern, flat looking design that takes up minimal space in the fishtank. It is fully submersible, and it will easily attach to any side of your aquarium. It is also very simple to set it up. Product dimensions are 9.8 x 2 x 1 inches and 9.6 ounces.

With its Ultra-accurate electronic thermostat with an ON and OFF indicator lights, you can adjust temperature water to an accuracy of +/- 0.5 degrees F. You can set it up to maximum 96 degrees F. It also includes a unique feature, LED display. It will show you the current temperature of the water, and of the heater itself.

As for the safety features, it includes a shatterproof casing that is pretty durable and resistant. The other one is thermal protection system. It will automatically shut down to prevent overheating. When the water temperature starts to fall, it will turn back on. It works for both fresh and salt water.

Be sure to follow the instructions closely, some users reported malfunctions in temperature regulation.

finnex electronic controller aquarium heater review


• Made from titanium
• Corrosion resistant
• Easily attach to the aquarium
• LED light indicators


• Might overheat

If you want advanced aquarium heater, than this is the right product for you. The thing that makes this product special is that it is made all from titanium. So, no plastic, no glass, and no quartz. We all know how strong is titanium, so its durability is guaranteed.

It comes in five different versions: 100 Watts, 150 Watts, 200 Watts, 300 Watts and 500 Watts. It can be used for up to 100-120 gallons tank. Its dimensions are 14.5 x 1 x 1 inches and 14.4 ounces.

This heater is suitable for both fresh and salt water. Both ends of the tube are covered with a specialized plastic that will prevent damage on your tanks glass.

Don’t be fooled by the size of this product. Even though it is small it has a super fast heating system, that will quickly warm up the water. You can adjust the heat with its unique designed controller who is set up outside the tank.

It will be easier for you to control the temperature, and LED light indicators will allow you to see if the heater works correctly.

Be extra careful with its super fast heating system. It can increase temperature water fast, but it can also overheat this way.

hydor heater original ETH review


• You can hide it
• Special polymer heating system
• Adjustible temperature with an ergonomic knob
• Special plastic protection
• Light indicator


• Might overheat
• Some complain about thermostat

If you are looking for a heater that you can hide, than Hydor In-Line External is the perfect choice for you. Following the instructions, you will assemble it quickly. It attaches to your canister or a pump. It comes in three different sizes: 200 Watt ½“, 200 Watt 5/8“ and 300 Watt 5/8“. Its dimensions are 4 x 4 x 12.5 inches and 12 ounces.

It will automatically shut itself off, before overheating. With its particular polymer heating system, you don’t have to worry about any damages on your unit or tank. If the water flow is very low, this heater will prevent variations of the temperature. It is not submersible, so be sure to use it in-line only.

With an ergonomic knob you can maintain the water temperature between 65 and 93 degrees F. Safety feature on this product is the special plastic protection to prevent leaking in internal parts.

The red light will notify you that the heater is operating correctly. It will keep your water temperature stable at the specified heat +/- 0.5 degrees. It has an easy built-in clamping system. So, you shouldn’t have a problem installing it.

Some users complain about its durability.

The Benefits of Aquarium Heaters

The Aquarium heaters are a necessity if you want to provide the best care for your fish. It keeps them warm and healthy and gives them a sense of the perfect natural habitat. Also, they are easy to use. So, if you have a busy lifestyle, it won’t take much time for you to maintain them. The fish are indeed the easiest pets to maintain.

Health benefits

You surely did some research about their natural habitat requirements. Some of them are capable of living in the colder surroundings, but some of them prefer it warm. To keep your fish healthy you need to control the temperature of the water. Unlike humans and many other animals, fish cannot produce body heat of their own. To keep their body temperature constant, you must provide them adequate factors in order to survive. What does this mean? Some fish can’t tolerate cold water. Especially when it comes to tropical fish. They prefer a little warmer surrounding than other fish.

Keeping aquarium water temperature safe for the fish

An essential factor that heaters provide is to maintain the adequate warmth in your fish tank. It shouldn’t vary much. They can detect these temperature swings, especially if you have tropical fishes. It could be very stressful for them, and it could even cause sudden death. But, with the aquarium heater you will provide the right temperature for your pets. Heaters don’t allow water temperature to vary more than 1 or 2 degrees in a daily period. Especially at night, when your room temperature is coolest.

Indicator light show you adequate temperature of the water

With these special lights, you don’t need to worry about overheating. Almost every heater has to shatter resistant materials that protect it from breaking and damaging while constantly cooling and heating. This is very important part of this product. With an adjustable temperature regulation, you can easily maintain warmth in your fish tank, and help your little pets stay warm. 

Great Against Bacteria

Many bacteria problems, parasites, and diseases can be removed by increasing the water temperature of your aquarium. It will help your fish stay healthy.


As the owner of an aquarium you need to make sure that your fish are happy and healthy. What could be better than providing them nice and warm surroundings? Keeping an adequate temperature for your precious pets is an essential factor for them. With the water heater, you can adjust the right temperature and keep it in the adequate condition for your fish.

You can choose between different types for a specific size of your aquarium. Just make sure to follow the instructions that come with the product.

Products Reviewed by Kobi Pets