8 Best Aquarium Chillers in 2021 (Reviews & Guide)

Mostly your Aquarium inhabitants will be fish. Fish are cold-blooded and you need to ensure that temperatures of your aquarium are favorable for the fish. For this reason, since you can’t control the temperatures of the surrounding you need a chiller to control the temperatures of the aquarium. 

For anyone new to aquariums will wonder what a chiller is and what its use is. The chiller makes the temperature of your aquarium be within the right range to ensure the survival of the animals and also their thriving. You need to choose the best aquarium chillers for the best results.

Best Aquarium Chillers Comparison Chart

Product NameBrandWeightDimensionPrice
Active Aqua AACH10HP Water Chiller Cooling SystemActive AQUA30.6 pounds18.2 x 11.8 x 18.2 inches
Chill Solutions 11415 Thermoelectric Aquarium ChillerChill Solutions4.4 pounds10 x 8 x 8 inches
Hamilton Technology Aqua Euro Max Aquarium ChillerHamilton Technology18 pounds14 x 10 x 14 inches
IceProbe Thermoelectric Aquarium ChillerNova3.2 pounds9 x 0.5 x 8 inches
Petzilla Aquarium ChillerPetzilla1.12 pounds8 x 2 x 6.3 inches
Coralife Energy Savers ACL36060 Chiller 1/10hpCoralife1 pounds14.5 x 13 x 16 inches
Zoo Med Aqua Cool Aquarium Cooling FanZoo Med1.1 pounds3.9 x 1.6 x 5.5 inches
JBJ Aquarium Arctica Titanium ChillerJBJ41 pounds13 x 19 x 20 inches

With the many aquarium chillers on the market today, it can be tough to differentiate which model is right one. We have made your work easy by narrowing down the options on the market. Our reviews and guide cover quality aquarium chillers that you can depend on.

When looking for a large-sized capacity chiller to add to your fish tank, then this chiller is the best pick for you. It is both user and environment-friendly and has a storage capacity of up to 5o water gallons. It has a neon free item with zero effect on the environment. When planning for long holiday summer trips, never be confused about the techniques of keeping a moderate temperature inside your aquarium. It has a perfect water cooling mechanism.

The good news is that it is easy to operate and the touchpad has an LCD light which makes it easy to operate.

What I like

This amazing product has a rating of 1,020 BTU per hour and is designed to produce extremely low sound with a 50-Db sound range. It comes with a pair of fittings, so, you can choose either 1” or ¾” tubing. Also, it has great dimensions that measure 11.8W by 18.3L by 18.4H and you can easily pack it at the back of your car, making it easy to carry. That sounds amazing, right?

What I don’t like

The temperature settings stored within the unit’s memory.Therefore, this chiller can restart itself after disconnecting it from power or in case of power failure.

  • It has an anti-corrosive titanium evaporator best for fresh and saltwater
  • Features an extensive refrigeration scope
  • An amazing flow rate
  • Best compared to other chillers.
  • Has competent chilling abilities
  • It features minor cooling defects
  • It may experience some efficiency problems in some part

This amazing nano chiller keeps your water temperature constant despite any daily fluctuations in ambient room temperature. It comes with an inbuilt thermostat that can be fixed anywhere between 45F to 90F. It is a good chiller best to hydroponics setups, nano tanks, and aquariums that have up to 30 gallons of water. 

It has a smart technology with a smartly designed intelligent speed fan that is essential in controlling and elimination ofunwanted noise. 

The thermoelectric technology is vital in the conversion of electrical energy into cooling power.

What I like

This chiller has a power supply that accepts numerous voltages that range from 100-240 v. more so, it has a standard 3-pong US power cable. It is convenient to use if its application is located some distance far from the socket.

What I don’t like

I didn’t like the fact that some people claimed that poor handling of this cooler can lead to quick malfunctioning.

  • It is easy to use.
  • Has an extended power cord
  • It is lightweight with only 4.4 pounds
  • Low power consumption ability
  • Low maintenance
  • Built with durable stainless steel materials
  • It may fail to cool large aquariums
  • The chiller is quiet but its operation is very noisy
  • Limited to only one year warranty

This is another amazing aquarium chiller that you need to maintain the right temperature in the aquarium. The unit allows you to lower the temperature of the water so that your pets stay in a conducive environment. It is equipped with a quality digital LED temperature display that helps you to maintain the right temperature.

What I like

This is a quality aquarium chiller that is made of titanium material meaning that it doesn’t corrode. It also consumes less power and gives a superb cooling in your aquarium. This chiller also features a high efficient condenser that is also energy saving so your energy bills will be low.

I also like the fact that cleaning and maintaining this aquarium chiller is easy. You will also have a simple time when it comes to set up. Follow the instructions given so that you can be sure it is working the right way.

What I don’t like

Some users don’t like this model because it loud during operation. There are also some complaints of in accurate temperature sensor providing more than 3 degrees difference.

  • Powerful and features a compact design
  • It is easy to use
  • Has a great anti-freezing system
  • Easy to clean and maintain
  • Display screen stops working
  • Some users don’t find it reliable

This is one of the famous chillers appliances if you are planning to venture in the aquarium world. Many thanks to its optimized results, efficient design and fair price tag. It is suitable for every fish keeper to be it experienced or newbies. Ice probe aquarium chiller has a compact design which will reduce your worries if you have minimal storage space.

Its operation isn’t automated and with that, it has numerous controller options that are essential in setting up this chiller if there is a need. All in all, it is an effective and affordable chiller and it will deliver exactly according to your expectations.

What I like

This chiller works in a quiet manner and plenty reports from many users are that all components and aspects of this chiller are built of high-quality materials. This includes all bolts and nuts that are meant to keep everything tight thus minimizing any chances of leaking.

What I don’t like

The fact that many users claim that it is meant for small tanks only is annoying. You can’t use it in a large surfaced aquarium.

  • Features a compact and easy installation
  • Its operation is quiet
  • It’s backed up with a one-year warranty
  • Only productive in small tank capacities
  • comes with a one year warranty

Are you a budget savvy fish keeper? Do you want to buy a powerful product at your lowest budget? Then you’re at the best place. Petziller chiller is one of the cost-effective cooling products with the ability to buy 1 to the 5-fan system. Although this depends on your needs.

It is both generous and rapid and petzilla chiller lowers the temperature to up to 4 degrees Celcius. It comes with an adjustable and a sturdy clamp that is essential for angled set up. Also, keep in mind that it has a variable size. But this will depend on the number of funs ordered.

What I like

It’s easy to use and there’s no need of using a hose or a pump for its proper functionality. It’s lightweight and small in size. I liked it because it’s portable and you can just pack it in your car and transport it anywhere you want.

What I don’t like

Many users have raised complains that this model is noisy when powered. Others say that it consumes more power.

  • This product comes preassembled, quite adjustable, and
  • easy to set
  • Has a compact size and lightweight
  • Has an amazing cooling system
  • It is very cheap as compared to other models
  • May fail to fit in several setups
  • Best for specific temperature reduction

This aquarium chiller is amazing, and the perfect chiller for tanks of all sizes whether big or small. It can manage fully aquarium temperatures up to 55 water gallons. It can maintain water temperatures ranging from -/+ 2°F.

If you want to save your energy from excessive power consumption, then this is the best pic for you. Each of its aspects is designed to work perfectly with minimal energy. In addition to that, this chiller has replaceable parts and so you can maintain the chiller for a long time.

It is extremely a good filler ideal for advanced tank keepers and beginners alike. With just a simple one-step installation process, highly durable design, and near-silent operation when powered on, what else can you look for in a chiller? This is the best!

What I like

I liked the fact that it can properly function in a tan that can hold more than 55 water gallons. Also, it features an easy process when you want to program it to function at the desired temperature without cooking your fish.

What I don’t like

It’s somehow heavy as compared to other aquarium chillers in the market. Others claim that it has a short-term warranty.

  • Functions extremely quietly
  • A replaceable air filter that’s easy to clean
  • Maintains temperature between +/- 2°F
  • Built with a titanium heat transfer material for
  • durability and energy-saving purposes
  • Has a short term warranty
  • Poor handling can lead to quickly break down

Do you have small indoors set up? If yes, then you are lucky. This might be the best aquarium chiller for you. Zoo Med Aqua cooling fan produces a temperature difference of 2 to 5-degree dropout without any unnecessary water leak from the tank.

This powerful product is extremely handy and light weighted and you can simply carry it anywhere you want. Be it on your backpack or at the back of your pickup. It only measures 1.1 pounds. The more good news is, this eye-catching product features a compact design that measures 5.5 x 1.6 x 3.9 inches. 

What I like

This is a small product but highly capable of maintaining your tan’s temperature constant or low even up to midsummer seasons. By the way I liked it more because it can hold water up to 10 gallons.

What I don’t like

Sometimes it produces an irritating sound that comes out as a result of the fan blades rotation that cannot be avoided, unless you switch off the chiller.

  • Highly accurate and functions exactly according to your expectations
  • It features a low energy consumption
  • It can work best in up to 10 water gallons
  • It is extremely portable and lightweight
  • Only designed for small water tanks
  • It is backed up by a short period warranty

This aquarium chiller is the best tool for a tan owner who needs a quick working product. JBJ Arctica Titanium is a durable chiller and is well known for its durability as its build with strong materials and numerous aquarists. It’s a good design meant for creating natural temperature, offering the best environment for biota, coral, fish, and other aquatic animals.

People hate noise. Just imagine sleeping with noises from all over, from the water chiller, your generator, and pets. It sounds embarrassing, right! This is an energy-saving, quiet, and a powerful cooling system designed in a small manner. It operates in a still and quiet manner.

Additionally, it comes with barbed in-line in-built connections for convenient and fast setup. A big thanks to the manufacturer for designing this model in an environmentally friendly manner as this chiller uses ozone-friendly the refrigerant which is safe for your health.

What I like

I liked its high efficiency to drop the temperature down in a quick manner, which makes it the best pick in hot regions. Also, I liked the fact that it has an anti-corrosive feature that boosts its life span.

What I don’t like

The fact that many people complained that it is quite expensive. Additionally, it needs a water pump with a sizeable tubing. Although, this is sold separately.

  • It’s an environmentally friendly cooler
  • Has a fast cooling ability
  • Exclusively quietest chiller
  • It’s a productive condenser
  • Safe refrigerant and ozone-friendly
  • It has an energy-saving titanium
  • Has an automated digital temperature mechanism
  • It’s pricey and may not favour the budget savvy
  • Tubing and water pump are missing (they’re sold separately)

Buying Guide

When it comes to choosing the best aquarium chillers you need to consider some key factors to ensure you get the desired temperature results.

The rate of flow

You need a chiller with the right flow rate. The flow rate will determine how the chiller maintains the temperature of your aquarium. The flow rate should not be too fast or too slow.

Energy consumption

You want to ensure that your electricity bill is not too high due to the chiller. The energy consumption of the chiller becomes a key consideration. Most of the aquariums are designed to use little energy and produce better results. You can also choose among your list of best aquarium chillers and rate them following their power consumption and choose the one that suits you.

The capacity of the aquarium

When choosing the best aquarium chiller the search goes in hand with the capacity of the aquarium. It is highly not advisable to use an aquarium meant for small aquariums on large aquariums. The best decision is getting a chiller that is compatible with the aquarium capacity for the best and effective results.

Construction of the chiller

You need an aquarium chiller that will last long. To ensure this you must be cautious about the material used to make the chiller. Most are made using plastic materials and also have some metal parts. You need to ensure that even the plastic parts are durable and will last longer and give you value for your money. 

The refrigerant liquid

Most people are concerned about their environment. Such people will look for a refrigerant liquid that is healthy for the environment. When looking for the chiller you want to buy, check the type of refrigerant liquid it uses to suit your environmental protection needs.

The noise produced during operation

Most aquariums have an indoor built design as most people prefer to have the added décor inside the house and so this brings up a need to have a quiet chiller. You could be handling serious things or your child doing their homework and so too much noise will be disturbing and reduce the concentration level and would affect your delivery. While choosing an aquarium chiller you need to consider the amount of sound produced. I love the fan- sounded chiller as the sound can be tolerated not the buzzing types which may grow noisier with time.

When to use an Aquarium Chiller?

You need to maintain very cool temperatures for the sake of the fish. Some fish require very cool temperatures for them to live comfortably. With this in mind, the aquarium chiller is used when the aquarium temperatures tend to rise above the limit or cool beyond the required levels. For the type of fish that require very cold water and a higher amount of oxygen dissolved in the water, you need to use the aquarium to ensure the temperatures are at the right level and also a high amount of dissolved oxygen.

How Does an Aquarium Chiller Work?

An aquarium chiller is a machine designed to remove heat from the aquarium water, and also moving the water into another place such as your flower garden in a process known as the heat exchange process. The chiller has components such as the condenser coil, heat exchanger, compressor unit and an expansion valve for the process to take place effectively.

The heat exchange process starts when the water flows into the chiller. The refrigerant liquid absorbs heat from the water and then the water proceeds to the heat exchanger. Most of the heat exchangers are made of titanium which is not corroded even by salty water, hence suitable for saline water aquariums. The heat exchangers give the water the required coldness fit for the fish to survive and live healthy in comfortably. 

The compressor component pumps the refrigerator vapor to the condenser where it is cooled and then taken back to the heat exchanger to absorb more heat from the incoming warm aquarium water. The process is a cycle where it repeats itself over and over again to ensure that the temperatures of the aquarium water are in the most right temperatures.

How to Install an Aquarium Chiller?

The installation of the aquarium chiller id different depending on the type of chiller purchased. The basic types of installations are the drop-in chiller and the inline chiller. The drop-in chiller has the heat exchanger put on the sump. This becomes easier to setup.

The inline aquarium chillers should have water flowed in them. Before you install you first determine the right flow rate for the chiller to function properly.  If you make the flow to quick or too slow the chiller might end up giving undesired results. 

The items that you require in setting up the aquarium chiller include; the actual chiller, a feed pump for pumping water, the installation unit, hose clamps of ½ inches, both fresh or saltwater and a temperature controller. Most of the fish aquariums have a reservoir in the bank that makes the most filtration. 

The most ideal way to install an aquarium chiller is to attach and embed a water feed pump into the reservoir or also the tank if in case there is no other option that exists to suit your installation. The electric setup should also be put correctly for its effectiveness.

How to Clean an Aquarium Chiller?

To clean the aquarium chiller you first need to disconnect the water pipes. Then disconnect the electric connection to ensure there is no power flow. 

After removing the front cover, you can vacuum clean to blow off any dust particle present. The heat exchange tubing is cleaned by using 3 gallons of water, vinegar acid, a bucket, and a pump to ensure water flows through all the tubing. For effective cleaning of the tubing, interchange the inlet and outlet ports and connect them to the pump. When the mixture of water and the acid flows in the opposite direction of its normal operation it gives an elegant clean. The water comes out dirty.

For the freshwater aquariums, all you have to do is rinse with clean water. Tilt and pour out the water. You can also use a hosepipe and open the water to full force to ensure that any deposit that could be on the surface is removed.

For the saline water aquariums, you will have to use vinegar to remove deposits of calcium or any other earth metal from the sides. Then rinse using distilled water to wash off vinegar from the inner surfaces of the chiller.


Q. Is it possible to chill an aquarium to a constant temperature without changing the room temperature?

A. It is difficult to chill an aquarium to a constant temperature without changing the room temperature. So the best way to ensure a constant temperature the aquarium should be used in an air-conditioned room or also using the frigid units. 

Q. What is the importance of using an aquarium chiller?

A. An aquarium chiller is an essential tool for your aquarium. It is used to cool the temperatures of the aquarium water by removing the heat in a process known as the heat exchange process. Most fish, (not tropical) mainly thrive in very cold water. To maintain such temperatures you need the best chillers to cool your water to suitable temperatures to ensure a comfortable and endurable environment for your fish.

Q. How do you identify the best chillers in a wide range of chillers?

A. There are several factors to consider when choosing an aquarium chiller best for your aquarium. The factors include the capacity of the aquarium where you have to choose an aquarium chiller that is capable of cooling all the aquarium water. Also, the flow rate is another factor to consider.

Final Verdict

For any aspiring and lover of aquaculture, you need to know how to maintain the right temperatures of your Aquarium that will not only give the fish a conducive environment but also gives them enough oxygen that is dissolved in the water.  In this review, you will get the most correct information about how to choose an aquarium chiller and also some of the frequently asked questions like how to install, how to clean and many others. It is an eye-opener on the importance of having an aquarium chiller to maintain a conducive environment for the fish and other aquatic animals to thrive.

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