Best UV Sterilizers for Aquarium in 2021


Complete the setup of a saltwater or freshwater tank with the best UV sterilizers for aquarium. These devices work to keep the tank water clean and clear because it can get rid of the pollutants, algae, bacteria and other microorganisms that can cloud and pollute the water.

You might want to get one for yourself to ensure the health of your fish! With a UV sterilizer, you don’t have to clean your tank frequently; thus, you can save much effort and time that you can spend on other activities. If you’re ready, let us go ahead and review the top six picks on the market to help you pick the right one.

What is the Best UV Sterilizers for Aquarium

See also:

Top 6 Best UV Sterilizers for Aquarium Reviews

1. AA Aquarium Internal UV Sterilizer up to 50 Gallon


If you want to keep your tank clean, you can check out AA AquariumUV sterilizer. It is a compact and easy to install sterilizer that has a great capacity. You can use it even for a 50-gallon tank.

The sterilizer does its job well in terms of cleaning the water in the tank. If you are a serious hobbyist that wants to keep your fish healthy, you should not miss this item.

It can help controlling the bacteria and eliminate the algae. With it, you can also improve the clarity of your tank. This item also features an advanced UV system that you can rely on to do its job.

However, it can be tricky to install for first timers. Overall, you can check it out to keep your tank water clean and clear.


  • Can be installed easily
  • Ideal for tanks up to 50 gallons
  • Comes with a power head
  • Complete with accessories
  • Satisfaction guaranteed


  • A bit tricky to install for first timers

2. COODIA Internal UV Sterilizer up to 55 Gallon Aquarium


The UV sterilizer is another great option for people interested in keeping a fish tank. What is good about this internal UV sterilize is that it is safe for use in either a freshwater or saltwater setup.

I would like to note that this item has a large capacity that it works for up to 150 gallons tank. In addition, this model is complete with a UV light that can last long. I am also glad to recommend it because it comes with an efficient 5-watt water pump.

This model can also help in producing air bubble to the water. In addition, it comes with a ceramics rotator that is made of noncorrosive material.

On the cons, the pump might suffer from damage over time. But still, I would like to recommend this sterilizer if you’re looking for a quality and durable sterilizer that will give you the most out of your spending.


  • Large capacity
  • Easy to set up and maintain
  • Comes with a water pump
  • Includes a UV light
  • Can eliminate the algae and keep tank water clean


  • Pump might suffer from damage over time

3. AA Aquarium Internal UV Sterilizer up to 20 Gallon



Cleaning a tank that gets dirty pretty much so fast is quite annoying for the many of us. That is why we need devices like a UV sterilizer, like this AA aquarium sterilizer.

This UV sterilizer is a top-rated item that has sold more than 500,000 units worldwide. It also features all the things we need, so it doesn’t require special tools.

The item also comes with a sealed UV bulb, offering great efficacy and water dwell time. Finally, the sterilizer comes with a generous three years of warranty on the pump.

However, this model is not suitable for a larger tank. Overall, this item can help us say goodbye to algae. It is a powerful machine that can get rid of the pollutants, bacteria and algae to keep our pet fish happy and healthy.


  • Sealed UV bulb
  • Helps prevent green water
  • Easy to install plug-and-play design
  • Good warranty included
  • UL/CUL Listed


  • Smaller capacity

4. SunSun JUP-01 9W UV Sterilizer up to 75 Gallon Aquarium


The JUP-01 submersible UV sterilizer is another top pick that will not let you down. It is an amazing product that can ensure that there will be no more floating algae and microorganisms that might otherwise put your fish in danger.

One of the things that I liked about this sterilizer is that it is effective and simple. It is a submersible type of sterilizer that makes it more efficient than other models are when it comes to the sterilization benefits.

I also liked that we don’t need to buy any additional circulation pump or tubing. This model also comes with an integrated pump, so it does not require buying it.

However, this model is a bit bulky, though. Still, it is a recommended UV sterilizer because it is efficient and durable.


  • Prevents waterborne diseases
  • Integrated pump
  • Includes a mounting bracket and suction cup
  • Keeps aquarium water clean
  • No need for additional tubing


  • Bulky

5. SunSun JUP-02 5W UV Sterilizer up to 40 Gallon Aquarium


Another UV sterilizer not to miss when comparing your options is this JUP-02 item that is a reliable pick for many tank owners. This model is suitable for tanks with up to 40 gallons of water.

This model is also ready to install because it comes complete with the accessories you need. It is also versatile and compact that it won’t ruin the appearance of your tank. I would also like to note that this UV sterilizer is with mounting brackets.

On the cons, this item is not for people looking for a higher capacity UV sterilizer, though. Nonetheless, it is what you need for its reliability and efficiency. Check it out for yourself.


  • Ideal for tanks with up to 40 gallons
  • Includes a powerful 5W light
  • Made of premium materials
  • Easy to set up and use
  • With a flow rate of 132 GPH


  • Not for tank owners looking for a higher capacity UV sterilizer

6. AA Aquarium Internal UV Sterilizer up to 120 Gallon


The large capacity UV sterilizer shouldn’t miss when comparing your choices for this item. It is powerful that it is suitable for up to a 120-gallon tank. With it, you can make sure that the tank water is clean, improving the health of your fish.

Also, the internal UV sterilizer is easy to install that you only must put it into your tank for clean water in a few days. The light rays coming from this unit can control the floating yeast, bacteria and other harmful microbes in your tank.

With it, you can also be certain of getting rid of the cloudiness in your tank without using any chemicals.

On the cons, it is a bit expensive, though, but it is powerful and efficient. It can give you peace of mind of getting the most of your spending.


  • No tools needed
  • LED signals if lamp replacement is needed
  • UV light efficiency with reduced water flow
  • UL Safety Tested
  • Can be used for freshwater or saltwater tanks


  • A bit expensive

Aquarium UV Sterilizer Buying Guide

We’ve reviewed the best ultraviolet sterilizers on the market, but we’re not yet done. Before adding one product to cart, you might want to know the things to look for when buying a UV sterilizer. As you may already know, there is no one size fits all approach here. Check out these factors when comparing your options.


This factor is very important. There are sterilizers that cannot work efficiently on a large tank. That is why you should first check the capacity and suitability of an item to the size of your tank and its flow rate.

UV light contact time

The longer the contact time is the better. It just means that more UV light is working in killing the problems like algae. However, it also has to do with the water flow rate.

So, it just means that there is more contact of the light with a low water flow rate. In this case, more bacteria will be killed in that process.

Another thing to affect the performance is the time that the light is on. Thus, it is better to know that more exposure to the light works great.


We don’t want to spend on an item that breaks after a few uses. Believe me, it is so stressful to waste your money on that. That is why it is important to check for quality and durability. As much as possible, let us also check if the item is UL/CUL Listed to ensure compliance and passing to different standards.


Know that there are primary types available; they are the dry bulb, the tray type and the wet bulb type. Compare based on the features, benefits and drawbacks of getting any of these.

Bulb power

If you’re looking to kill a wide range of microorganisms, you should find a high wattage to produce a higher amount of UV light.

What is an UV Sterilizer?


This device is a special equipment that helps clearing and cleaning the tank water. It helps in getting rid of the bacteria and algae that causes a green and cloudy water. It uses a UV light bulb that works to eliminate the microorganisms that makes the water dirty. Some of these also include parasites and viruses.

Types of UV Sterilizers

The UV sterilizer is one of the most significant devices that you should not miss to have if you have a fish tank, which can get cloud easily due the microorganisms, like parasites, bacteria, viruses and algae.

These do not just make the water dirty, cloudy and green, but they can pose danger to the health and being of our tank friends. It is why we need sterilizers like a UV sterilizer that works with a UV light bulb to kill the harmful microbes in the water.

However, you might have been confused on the type of UV sterilizer to get if it will be your first time to buy it. The three types of these devices include the dry bulb, the wet bulb and the tray type.

You should know the differences among these types so that you will know what is for you. Take note that the wet bulb type isn’t tied up with the system’s quartz. So, having this said, you need to install a UV sterilizer with a quartz sleeve to make the process of cleaning easier if your water system is cold. In this case, you will also find it easier to clean the bulb.

To distinguish the kind of sterilizer you need, you might also want to consult with the pet shop or website where you are buying it. In many cases, you will find these products with a tube-like design. It can also be inline that is connected to a power head. Some are also standalone devices, and the others are basically connected with a canister’s outflow.

Why Do You Need UV Sterilizer for Aquarium?

You might be interested to know what benefits to get if you install a UV sterilizer for your aquarium. At the very least, this unit is one of the most significant devices that you need for your tank because it can keep the tank water clean and clear.

For one, an effective product can eliminate algae, parasites and bacteria. It is one of the clear advantages of installing this device in your tank. It can get rid of these microbes that can otherwise pollute the tank water.

With a UV sterilizer, you can improve your tank water that can greatly affect the heath of your fish. These impurities can cause the cloudiness of your tank water.

And with a clean tank water, you can ensure that you don’t have to clean the tank more often. You can also reduce the strain on your filter.

In addition, this device is a great alternative to using chemicals and other cleaners in the tank. You can be certain that you can keep your aquarium clean and your fish healthy.

These benefits are only some that you can get with the UV sterilizer, but they are not all that you can get from one. Nevertheless, you can rely on this device in terms of keeping the tank clean and clear from any microbes that would otherwise endanger your fish.

Frequently Asked Questions


How does UV sterilizer work?

The UV sterilizer works in a straightforward and simple. It does not involve any complicated process and steps. Basically, it works with a strong UV lamp. It is what kills the microbes and impurities in the water. This lamp can kill what can endanger the lives of your fish.

That is why you should get a UV sterilizer that can also reduce the straining of your water filter. It also works to get rid of the cloudiness in the water, ensuring it remains clear. With it, you can also ensure that you don’t have to clean the tank very often. To get started with the selection process, you might want to check out the top six picks that we’ve featured earlier.

How often to change UV sterilizer?

To know how often to change the UV sterilizer, you might also want to refer to the user manual that comes with the item that you have purchased. Nevertheless, the lamp’s efficiency can change based on its age. In time, the bulb becomes weak and needs replacement.

In some cases, you might have to change it every six months, or depending on the brand and type that you bought. To ensure that you’re dealing with a quality brand, you can also check out the reviews posted on these items. Or, you can refer to the above reviews for some of the top picks on the market that you can trust.;

Where to buy UV sterilizer for Aquarium?

These UV sterilizers for a tank are available in many places. In your community, they might be available in the pet stores or fish supplies shops. You can also get them from the manufacturer website. But for a wider selection, you might want to check out online marketplaces like Amazon or eBay.


Choosing among the best UV sterilizers for aquarium on the market can be a breeze! You can refer to our buying guide with the top-rated items along with their special features and qualities. Also, you can check out their pros and cons so that you can compare them well for later choosing.

With the right UV sterilizer, you can get its total benefits, including easy installation, efficiency and quality. It will also help keep your tank clean and your fish disease-free. So, don’t think twice, but take some time in considering your options and weighing them well. Buy the right ultraviolet sterilizer for your tank today!

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