5 Best Aquarium Water Clarifier

Do you find that the water of your fish tank/planted aquarium keeps becoming cloudy and murky, leaving you in doubt as to whether your aquarium is in a healthy condition? Not only does this ruin the enjoyment you’ll have for your tank because it doesn’t look right, in some cases, but it can also even be dangerous to your fish.

There are many reasons as to why your tank water might go murky and cloudy. From the coloring running from your equipment and mixing with the water, to more natural problems like algae growth and bacteria, the problems are numerous. Sometimes, it might just be that your tank water is dirty and needs cleaning.

The issue with having so many problems is that it’s hard to pin down what it is, which then makes it difficult to find a solution. However, thanks to advancements in modern-day technology and product innovation, there is such a product known as a water clarifier.

Water clarifier is a solution designed to spot the cloudiness of your water developing or getting worse. While this might not solve the problem, it’s a fantastic way to help you identify what’s going on easily without having to empty the tank which will easily stress out your fishes.

This is a fantastic way to make your life easier, and to ensure your fish are given the best opportunity for a happy and healthy lifestyle. The only thing is, which water clarifier is right for you?

To help you decide, today we’re going to explore the top five water clarifier solutions available right now, detailing everything you need to know to make the right choice!

Hagen Fluval Biological Cleaner for Aquariums

Hagen Fluval Biological Cleaner for Aquariums

To kickstart our list, we’ve opted for the Hagen Fluval aquarium cleaner, which is a cleaning solution for your tank that works very well as an aquarium water clarifier, as well as providing you with several other awesome benefits.

Jumping straight into the specs, you’ll find this is a cleaner available in two different sizes, so you can pick the one that’s best suited for your budget; although both, even the larger size, are very affordable and should suit most people’s budgets.

How this cleaner operates is that it rapidly works to reduce and break down all kinds of organic waste within your tank, which makes it far easier for your aquarium filter to process. It also helps dilute waste into your gravel substrates, and other aquarium surfaces; all in all, ensuring your water is clean and cloudless.

What’s more, processed into the solution you’ll find added chemicals that help provide your aquarium life and surfaces with protection from potentially harmful chemicals like nitrate and ammonia; meaning you get the added bonus of that.

Overall, it’s safe to say this is one of the most highly rated and most used water clarifying solutions on today’s market and you can’t really go wrong. If you’re looking for a great all-around solution, it doesn’t get much better than this!

  • Available in two different sizes to help manage your costs
  • Added protection against ammonia and nitrate
  • Helps organic waste dissolve and get caught in your filter easier
  • Created by one of the most reputable aquarium product brands
  • None!

Tetra Crystal Water Clarifier

Tetra Crystal Water Clarifier

Another leading producer of aquarium products is Tetra; a household name that has brought many amazing and helpful products to the market, and their water clarifier line is no exception. What you’ll love about this product is just how effectively it works, and just how clear it can make even the cloudiest of tanks.

How this clarifier works is that it binds together the cloudy particles of your water and binds them together. This makes the particles bigger which makes them much easier to be caught up by your filter or removed manually.

In fact, this solution works so well that you can see results within the first 2 – 3 hours and then your water will be to an acceptably clear level within 6-8 hours. From there, within 6-12, your water guarantees to be crystal-clear, almost like brand new!

Regarding the specs of this solution, the clarifier is suitable for aquariums with any KH-values and helps to keep your fish happy and healthy in their tank. As you can see, this is a great solution that does everything you would expect it too, making it a great choice for fresh-water tank owners everywhere!

  • Makes your tank water crystal clear within 12 hours
  • Works by clumping together waste making it easier to be filtered
  • Available in two handy and convenient sizes
  • Produced by a renowned aquarium brand
  • Only suitable for freshwater fish tanks

API ACCU-CLEAR Freshwater Aquarium Water Clarifier

API ACCU-CLEAR Freshwater Aquarium Water Clarifier

API is a lesser known brand in the aquarium world, but it’s just as highly rated as the more premium brand’s thanks to its rapid performance and affordable price tag. All you need to do is follow the instructions on the bottle to clear the water quickly and easily. Easily the best feature of this solution is how fast it works.

How it works so quickly is that it thickens up the organic waste particles, much like the Tetra solution above, which over time makes the solutions form clumps. These clumps, while in a small state, can be processed by your filter, or you can leave it for a few hours and then go back and remove them by hand.

Once again, this solution is only suitable for freshwater tanks, and it’s recommended you use it weekly for the best and most continuous results that last for weeks to come. If you’re looking for a solution that keeps your tank water crystal-clear at all times, and no downsides, it doesn’t get much better than this!

  • Clumps up organic waste so you can easily remove it
  • Suitable to be added to your aquarium on a weekly basis
  • Available in three unique sizes and prices
  • Rapid performance that works effectively within hours
  • Only suitable for freshwater tanks

Aqueon Water Clarifier

Aqueon Water Clarifier

Next up, we have another highly reputable aquarium manufacturer from the USA that goes by the name of Aqueon. If you’ve shopped for specific pieces to your aquarium before, the chances are you’ve crossed paths with what Aqueon has to offer.

With their line of water clarifier products, you’ll be able to enjoy all the benefits that come from a product that can rapidly clear up any cloudiness in your aquarium environment, whether you’re cleaning, looking for a problem, or simply just trying to make your tank look its best.

In terms of using the product, all you need to do is add the solution to your water, wait a couple of hours and then replace or clean your filter cartridge, since all the organic waste will be collected and processed automatically here. As with other solutions, this is only suitable for freshwater tanks.

To make things super easy, the lid of the bottle is also designed to be an exact measurement cap to what you need, helping you get the right measurements each time, thus keeping your tank safe and healthy, and ensuring your bottle lasts as long as possible!

In short, there’s really nothing bad to say about this line of water clarifiers, and it will be exactly what you need it to be, making it safe and easy to keep the waters of your fish tank spotless and free from those pesky clouds!

  • Made by a reputable brand at home in the USA
  • Helps your filter process all organic waste causing cloudiness
  • The bottle cap is an exact measure for dosages
  • Works quickly and effectively!
  • None!

Algone Aquarium Water Clarifier and Nitrate Remover (6 Pouches)

Algone Aquarium Water Clarifier and Nitrate Remover (6 Pouches)

The final product we’re looking at today in terms of water clarifiers comes from Algone, which is a unique take compared with the other products we’ve featured today in our list. This is because Algone comes in a box of 6 pouches, rather than a cleaning solution.

How this works is you simply drop a pouch into your filter system, rather than the water itself, and then you let it get on with what it has to do! Amazingly, these pouches can, therefore, treat tanks between 5 and 110 gallons, which gives you such a diverse range of operation. This equates to work up to 330 gallons of water, which is much greater than traditional cleaning methods!

Of course, all the utmost care and attention have been given to this product to ensure its safe for your plants and aquatic life, all while clearing any green or cloudiness in your tank; making sure your tank looks beautiful at all times with minimal effort on your behalf.

There are multiple pack sizes to choose from to help you find the one that best suits your tank setup and budget, and there are so many highly rated reviews from past customers; it’s hard to know where to begin.

In addition to the cleaning properties, this solution actively removes ammonia and nitrates from your tank water to help keep the levels safe, overall leading this to be one of the most highly functional water clarifiers available today! What are you waiting for?

  • Can effectively clean up to 330 gallons of water per tablet
  • Countless highly-rated reviews from past customers
  • Cleans any green or cloudiness from your tank
  • Multiple pack sizes available to give you the best experience
  • None!


When it comes to choosing the water clarifier that works for you, it’s safe to say you’ve got plenty to choose from, so much so that you can’t really go wrong. All you need to do now is figure out what you want from your preferred water clarifier before making the right choice.

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