The best aquarium chiller can help you regulate your tank’s temperature and complement your fish’s health.

There are countless options in the market but finding the one you can rely on can be challenging.

So to help you find the perfect aquarium chiller for your fish tank, we have tested dozens of models and created a list of the best ones. Let’s get started.

Comparison Chart

Product Tank Capacity

(in gallons)

Cooling system Type
BAOSHISHAN  Aquarium Chiller

75 Compressor
Poafamx Aquarium Chiller

16 Electronic cooling
DaToo Aquarium Chiller Fish Tank

10 Fan cooling
JBJ Arctica Aquarium Chiller

40 Compressor
WUPYI Adjustable Aquarium Chillers

50 Fan cooling

Review of Best Aquarium Chillers in 2021

1. BAOSHISHAN 300L Aquarium Chiller 75gal


  • Noiseless cooling fan
  • Has inlet and outlet settings
  • High-efficiency freon free chillers
  • Pure titanium evaporator
  • Four suction cups for holding the pump
  • Equipped with safety protection function


  • Expensive

BAOSHISHAN 300L is one of the most advanced chillers for aquariums in the market. It works best when used in a 75-gallon tank and maintains an ideal water temperature of 68 – 78.8 F, so your fish can swim around comfortably.

This chiller comes with an evaporator made out of 100 percent pure titanium, which is proven to be the best material for heat exchange. Apart from being efficient, titanium also has corrosion-resistant properties, making it suitable for both fresh and saltwater tanks.

The water temperature is regulated by an excellent heavy-duty compressor, which does so without polluting the environment as it does not release any toxic gasses. Unlike other compressor-based chillers in the market, BAOSHISHAN 300L’s fans operate silently and do not produce any strong vibrations.

It also comes with an auto-cut safety feature that turns off the fish tank chiller in case of voltage fluctuation. Another great feature that we love about the BAOSHISHAN 300L is that you don’t have to adjust the temperature settings again and again if the chiller is turned off. This feature is because it comes with a temperature-memory system that keeps a record of your preferences.

The installation is very simple and does not require any power tools to set up. Simply attach it to your aquarium brim, calibrate the temperature according to your preference, and you are good to go. The chiller has multiple heat distribution holes on both its sides that release warm air. So make sure to keep at least 6 inches of space on either side for the device to cool down properly.

Cleaning the BAOSHISHAN chiller is just as easy as installing it. If you are using a saltwater aquarium, you can clean the calcium deposits and salt creep tank every two to three months using vinegar. Whereas, if you are using it in a freshwater aquarium, you can simply rinse the device, and it’s done.


BAOSHISHAN 300L is a perfect choice for all types of aquariums. However, it works best if you have a 75-gallon tank. It’s easy to install, doesn’t need frequent cleaning, and maintains an optimal temperature of your tank to keep your fish healthy.

2. Poafamx 16GAL Aquarium Chiller


  • Circulation refrigeration technology
  • Electronic cooling
  • Low noise
  • No emissions
  • Low power consumption
  • Large number of outlets for heat dissipation


  • Slow heat dissipation for its size.

Poafamx Aquarium Water Chiller is a powerful fish tank water cooler that is ideal for small tanks with 16 gallons or less capacity. It maintains the optimal temperature of your tank and makes it suitable for your fish but also for coral reefs, axolotl, and crystal shrimp.

What sets the Poamfamx Water Chiller apart is that it does not use a compressor or a refrigerant to cool the aquarium. Instead, it uses radiator-based electronic refrigeration technology.

It means that you do not have to add any refrigerant, reducing emissions and making it environment-friendly. It also consumes considerably less power than compressor-based aquarium chillers, giving you great value for money.

It can cool down the water by up to 9 F in a few minutes, and you can also monitor the temperature on a small screen attached to the body with several control functions next to it.

The cooling system comes with a noise reduction fan that makes less than 45dB of noise. It makes it a quieter alternative to traditional compressor cooling chillers. It also runs smoothly without creating any disorienting vibrations, which are usually harmful to fish and other small aquarium creatures.

Inlets and outlets are present on all sides of the chiller, which provides a great ventilation system for heat dissipation. We recommend placing the chiller in a spacious environment for better results so the heat can escape easily.


If you want an eco-friendly way of cooling your fish tank, Poamfamx Aquarium Chiller offers electronic cooling technology to manage your tank’s temperature. It is a great choice for miniature aquariums as it is very compact and can fit in tight spaces.

3. DaToo Aquarium Chiller Fish Tank Fan Aquarium


  • Engineering grade ABS fan
  • 12V voltage consumption
  • Two-level wind speed adjustment
  • Powerful fan cooling system
  • One year warranty


  • The fan is a bit noisy

DaToo Aquarium Chiller is a powerful cooling system that uses a pair of fans to regulate the water temperature. It has a very easy-to-use and compact design that makes it a great option for small tanks.

The fans are made from an engineering-grade aluminum alloy, which gives them a long life. Their durable and robust design means you don’t have to worry about any physical damage at all.

The fans spin at 3500 R.P.M, but you can change this according to your convenience as the device comes with two fan-speed modes. You can also alter the wind direction between 90-190  to adjust the airflow. Even though the device has flexible usage, it does have a small drawback.

Being a fan-based chiller, you can expect some noise from it, which may be disturbing for some people. Rest assured, it does not produce strong vibrations that can otherwise harm your fish. Installing the DaToo chiller is also very simple. All you need to do is fix it on the brim of the aquarium, connect it to a power source, adjust the airflow, and it’s done.

Despite having a fan-based cooling setup, it can quickly drop the water temperature by 4 – 6 F. It makes the tank environment suitable for your fish without adding up the extra cost to refill the refrigerant every once in a while.


If you have a small fish tank, then DaToo Aquarium Chiller is a great choice to cool your aquarium water. It has a durable build, flexible usage, and a straightforward setup. It uses strong wind to cool your aquarium water while still being energy efficient.

4. JBJ Arctica Aquarium Chiller, 1/15 HP


  • Easy to read LCD controller
  • Two-year warranty
  • Simple plug and play installation
  • Integrated thermostat to monitor temperature
  • Titanium refrigeration coils


  • On the pricey side

JBJ Arctica is another great solution for people looking for a small and silent aquarium chiller that uses a compressor to cool down the water. Its cooling mechanism works by pulling in air from the front and running it through a system of coils where it is cooled down. The cool air is then released back into the water, and heat is expelled from the back of the chiller.

Its condenser consumes less energy while still ensuring proper heat dissipation and cooling. It also comes with a built-in thermostat that closely monitors the temperature and automatically cuts off the power if the temperature falls below the configured settings.

JBJ aquarium chiller is a durable device as it uses a corrosion-resistant titanium build that protects it from any overtime water damage. Even though it is a bit pricey, it offers great value for money with its long-life and adaptable features. It’s safe to say that it can serve you for years without any issues, considering its premium build quality and sturdy design.


If you are looking for a small aquarium chiller that operates silently, JBJ Arctica is a great option to consider. It is a little wallet-heavy, but it makes up for it with its efficient cooling and long life.

5. WUPYI Adjustable Aquarium Chillers Cooling Fan


  • Hanging mode design
  • Low maintenance
  • Freely adjusting wind speed
  • The cooling system is made of plastic plus aluminum alloy
  • Ideal for freshwater and saltwater aquariums
  • Fits in aquarium wall with a thickness within 1.2mm, or 0.04 inches


  • Bit noisy

WUPYI Adjustable Aquarium Chillers is one of the best devices in the market that uses fans to keep the water cool for your fish. It is designed to be hung inside your fish tank with at least a 1.2mm, or 0.04 inches, thick brim. Aside from cooling the water, its compact design also adds to the aesthetics of your tank.

This chiller utilizes six fans arranged in a row to blow air on the water’s surface. You can freely adjust the wind intensity by cycling between the two fan speeds. It can reduce the aquarium temperature by 4 – 6 F for a 50-gallon tank while still being energy efficient.

The fans hang far above the water surface without any contact. It ensures that your fish do not get electrocuted in case of a device short circuit. However, having so many fans also means that you might have to perform occasional repairs as some of them might malfunction due to prolonged usage.

The downside of using fan-based cooling systems is the noise they produce. However, the sound is not very intense, unlike other options in the market.


If you want an affordable, fan-based cooling system for your aquarium, look no further than WYUPI’s adjustable aquarium chiller. It offers great flexibility, aesthetic looks, and excellent cooling at a substantially low price. It can be a bit noisy, but it’s only a minor trade-off for the features it offers.

Buying Guide for Best Fish Tank Aquarium Cooling System

We recommend going through the following points before you invest in an aquarium water chiller.

1. Tank Capacity

The first and foremost factor to consider is your tank capacity. An aquarium water chiller designed for small tanks won’t work effectively for large tanks, and large chillers will be overkill for your fish. Note down your tank size and find a perfect chiller that suits your aquarium. Use our comparison table mentioned above to find the best option for you.

2. Design

The type or design of the chiller you’re getting can make all the difference due to the features they offer. Some chillers are compact, while some take up space but are more powerful. Some designs might require plumbing, whereas some chillers are easier to install. You can find chillers that specifically target noise reduction and some that are made to consume less energy.

With so many brands making the same product, you can find multiple options for your specific needs. We recommend choosing a chiller designed to be silent, has enough power, and is easy to install.

3. Material

Since they are constantly submerged in the tank water, aquarium chillers can wear out due to rusting or corrosion. This issue can adversely affect their work, and they may also become energy inefficient, costing you extra money. This situation is more likely to happen in saltwater aquariums, and the device will eventually need to be replaced.

You can prevent it by choosing a chiller made from durable materials such as titanium. It is a strong and corrosion-resistant metal that is used to make high-quality chillers. By spending a little more, you can make your aquarium chiller purchase a worthy one-time investment for your fish tank.

4. The Flow Rate

In simple terms, the flow rate is the amount of water your chiller can cool in a given period. Naturally, a chiller with a high flow rate will be able to cool off your tank water quicker. However, this doesn’t mean a high-powered chiller is always an ideal choice, as it really depends on the size of your aquarium.

A high-powered chiller will overwhelm your aquarium and your budget if you own a small tank. Severely low temperatures are also harmful to your fish, so it is best to get a chiller that is on par with your aquarium size to get the most out of it.

5. Energy Consumption

The amount of energy used by aquarium chillers depends on the method they use to cool the water. A fan-based cooler consumes less energy compared to condenser-based chillers. You can go for any chiller type as long as it suits your aquarium. However, if you want to save energy, you’ll need to see which brands offer the maximum energy savings.

Since different brands use different materials and technologies to make their chillers, their power consumption rate varies too. Chillers that use outdated technology and poor refrigerants cause harm to the environment and cost you extra money, which is why we suggest paying attention to the energy efficiency of chillers before purchasing.

6. Type of Refrigerant

Traditional condenser chillers have a refrigerant, which is a liquid that is used in heat transfer. They absorb heat from the tank water and cool it off, making them the most important part of a condenser chiller. Therefore, it is very important to know what type of refrigerant is being used in them.

However, refrigerants have a bad reputation for being the cause of global warming, which is why you should prefer eco-friendly options such as HFC-134a and EcoFluro R410. They do not harm the environment or pollute the air even if they leak out, making them a good choice for your chiller.

Difference Between Condenser Chillers and Fan Coolers?

Different aquariums employ different methods to provide appropriate cooling. Two of the most common methods are condenser cooling and fan cooling. Here is a brief run-down of how they work and how they are different from each other:

1. Condenser Chillers

This is the most common type of aquarium chillers in the market. In these types of chillers, the cooling process starts in the heat exchanger, where the aquarium water is pumped up and passed over a network of coils that are surrounded by a refrigerant. As the water passes through this coil, it cools down to your preferred temperature.

The heat of the water is transferred to the coil itself. Afterward, it is then released from the back of your chiller unit, where the fans dissipate it. The cooled water is then released back into the tank, and this cycle is repeated until the entire aquarium is at a suitable temperature. Condenser chillers are more efficient, but they come at a marginally higher price.

2. Fan Coolers

Although it is not a very efficient cooling method, it is best suited for places where the room temperature is not soaring high. Fan chillers are attached to the rim of the aquarium directly above the water surface. They blow air on the water, which helps in evaporation and lowers the temperature by 2 – 4 F.

Fan coolers are often cheaper than other types of chillers. Moreover, they consume very little power, making them a very budget-friendly way of controlling your tank’s temperature.

FAQ: Aquarium Chillers

Here are a few common concerns people have when buying a chiller for their fish tank :

– Do I Need an Aquarium Chiller?

Yes, you need an aquarium chiller if you live in a hot region where temperatures go beyond 80 F. This is because it maintains the temperature of aquarium water and prevents diseases and heat-strokes in your fish and other tiny creatures. They are especially important if you own cold-water fishes like trout and bass.

– What Is the Ideal Temperature for Fish Tanks?

The ideal temperature for fish is below 80 F. Tropical fish usually prefer warmer conditions between 75 – 80 F. Whereas, if you have a goldfish and other cold-water species, keep the temperature below 70 F.

Unlike humans and other mammals, fish are cold-blooded creatures. It means they don’t have a constant body temperature and cannot adapt to temperature changes very well. They depend on the temperature of their surroundings to survive. So, you have to make sure your aquarium maintains an ideal range for your fish to thrive.

– Are Aquarium Chillers Loud?

Aquarium chillers can be loud, depending on how they are designed. Usually, aquarium chillers function silently and do not disturb the water a lot. However, fan coolers can be a bit noisy. It is not enough to harm your fish, but it can be irritating at times if you prefer silent devices.

– How to Clean an Aquarium Chiller?

Cleaning your aquarium chiller is very simple, but the process is different for freshwater and seawater tanks. For both types, you can start by disconnecting the water pipe and electrical connections.

If you are using saltwater aquarium chillers, you might notice some calcium deposits on the side walls. So you have to use vinegar to clean up the deposits on the chiller. Cleaning the chiller being used in freshwater tanks is comparatively easier. You can simply rinse the chiller with clean water and put it back in the tank.

– Where Should I Place an Aquarium Chiller?

Aquarium chillers are designed to be compact so that they don’t occupy much room. That said, the chiller you are investing in must be able to fit under your fish tank setup or somewhere close to the tank. However, It is recommended to keep the chiller in a spacious environment so it can work more efficiently.


Having the best aquarium chiller is very important to maintain the fish tank’s temperature and create a healthy environment for your fish.

It becomes even more important to use an aquarium chiller if you live in a hot region where temperature spikes up drastically.

Having warm water not only makes your fish uncomfortable, but it also absorbs more oxygen which can be very harmful to them.

If you want us to narrow down the best choice from the list mentioned above, we recommend you go with BAOSHISHAN 300L Aquarium Chiller. Though it lies on the pricey side, it incorporates advanced features to cool your aquarium water for the long run effectively.

5/5 - (10 votes)


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