Best Fluval Aquarium Water Treatments of 2025

Chloe Foster Avatar
Chloe Foster
Last Updated: 5 Feb 2025

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Aquarium Water Treatments by Fluval are a range of products designed to help maintain a healthy aquatic environment for fish and plants. The treatments are formulated to remove harmful substances, such as chlorine and heavy metals, from tap water, and to stabilise the pH levels in the aquarium. Additionally, the products help to promote the growth of beneficial bacteria, which aids in the breakdown of waste and reduces the risk of harmful ammonia and nitrite spikes. Fluval's water treatments are suitable for both freshwater and saltwater aquariums, ensuring that your aquatic pets thrive in a clean and healthy environment.

At a Glance: Our Top Picks

Fluval Cycle Biological Enhancer, 250 ml Cover #TOP 1
Fluval Cycle Biological Enhancer, 250 ml
ftb score rating icon 9.8
Fluval Aquaplus Water Conditioner for Fish Cover #TOP 2
Fluval Aquaplus Water Conditioner for Fish
ftb score rating icon 9.7
Fluval Activated Carbon for Aquariums Cover #TOP 3
Fluval Activated Carbon for Aquariums
ftb score rating icon 9.5

Top 10 Fluval Aquarium Water Treatments

#TOP 1

Fluval Cycle Biological Enhancer, 250 ml

A8349
250 ml
Fluval Cycle Biological Enhancer, 250 ml Cover
Fluval Cycle Biological Enhancer, 250 ml ( Packaging may vary)

The Fluval Cycle Enhancer is a powerful aquarium treatment that introduces beneficial bacteria to your tank immediately. This helps create a safe biological habitat for your fish, ensuring their health and wellbeing. It effectively eliminates harmful ammonia and nitrite, which can be detrimental to aquatic life. Importantly, this product is safe for plants, animals, and humans, providing peace of mind for aquarium enthusiasts. Using this enhancer can greatly simplify your aquarium maintenance routine.

What We Like
Effective at eliminating ammonia
Creates safe habitat for fish
Safe for plants and animals
Instantly introduces beneficial bacteria
Easy to use

Fluval Aquaplus Water Conditioner for Fish

A8344A1
500 ml
Fluval Aquaplus Water Conditioner for Fish Cover
Fluval Aquaplus Water Conditioner 500 ml

The Fluval Aquaplus Conditioner is designed to enhance the well-being of your tropical fish. It effectively reduces stress, creating a more peaceful environment for your aquatic pets. This complete tap water conditioner improves water quality, ensuring that your fish thrive. Additionally, it coats their scales and fins, offering protection against scrapes and cuts, which can lead to infections. With this product, you can feel confident that you are providing a safe and healthy habitat for your fish.

What We Like
Reduces fish stress
Improves water quality
Protects scales and fins
Complete tap water conditioner
#TOP 3

Fluval Activated Carbon for Aquariums

A1440
3 x 100 g
Fluval Activated Carbon for Aquariums Cover
Fluval Activated Carbon 3 x 100g Sachets

Fluval Activated Carbon is a high-quality filtration solution designed for both freshwater and marine environments. With its low-ash, highly porous structure, it provides extensive surface area for effective adsorption of impurities. This means you can enjoy crystal clear water, as it efficiently removes heavy metals, unpleasant odours, and organic contaminants. Importantly, it won't raise phosphate levels, making it a safe choice for your aquatic ecosystem. By using this activated carbon, you’ll enhance the overall health and clarity of your aquarium water.

What We Like
Removes impurities effectively
Safe for all aquatic environments
Does not raise phosphate levels
Enhances water clarity

Fluval Cycle and Aquaplus Water Treatment Pack

FBA_PTA8300
250 ml (Pack of 1)
Fluval Cycle and Aquaplus Water Treatment Pack Cover
Fluval Cycle and Aquaplus Water Treatment Pack, 250 ml

The Fluval Water Treatment Pack is designed to immediately create a safe biological environment for your aquarium. It effectively eliminates harmful ammonia and nitrite, which helps prevent fish loss. This means you can introduce fish right away without worrying about their safety. Whether you have a freshwater or saltwater setup, this product provides the convenience you need to maintain a healthy aquatic habitat.

What We Like
Establishes safe aquarium environment
Eliminates ammonia and nitrite
Prevents fish loss
Allows immediate fish introduction
Suitable for fresh and saltwater
#TOP 5

Fluval Bio Stratum for Aquarium Plants

12696
2 kg
Fluval Bio Stratum for Aquarium Plants Cover
Fluval Bio Stratum 2kg

Fluval Bio Stratum is designed to promote healthy plant development in your aquarium. Its unique formulation contains dormant beneficial nitrifying bacteria that activate upon contact with water. This feature helps break down waste and initiate the nitrogen cycle, ensuring a stable environment. You will also notice a rapid reduction in ammonia levels, which is crucial for new aquariums. The lightweight granules allow even the finest roots to penetrate easily, supporting vigorous growth and vibrant colours in your aquatic plants.

What We Like
Encourages healthy plant growth
Reduces ammonia levels quickly
Supports delicate root penetration
Enhances water quality
#TOP 6

Fluval Clear Max Phosphate Remover 300g Pack

A1348
Brown
300g
Fluval Clear Max Phosphate Remover 300g Pack Cover
Fluval Clear Max Phosphate Remover 300g - 3 x 100g - treats 3 x 100L,Brown

The Fluval Phosphate Remover is a convenient solution for maintaining your aquarium water. This 3-pack treats up to 27 gallons, making it ideal for both freshwater and saltwater aquariums. It simplifies maintenance by reducing odours, ensuring your aquarium remains pleasant. You can easily place it in the filter or directly in the water, offering you flexibility in use. With this product, you can enjoy a healthier environment for your aquatic life with minimal effort.

What We Like
Suitable for freshwater and saltwater
Reduces odours effectively
Easy to use in filter or water
Treats up to 27 gallons
Convenient 3-pack
#TOP 7

Fluval Waste Control for Aquariums

A8355A1
Fluval Waste Control for Aquariums Cover
Fluval Waste Control 250 ml

The Fluval Waste Control is designed to create a safe biological environment in your aquarium right from the start. It effectively eliminates harmful ammonia and nitrite, which can be detrimental to your fish. This means you can prevent fish loss and maintain a healthier aquatic habitat. Additionally, it allows you to introduce fish immediately, saving you time and ensuring your tank is ready for your new aquatic friends, whether in freshwater or saltwater.

What We Like
Establishes safe aquarium environment
Eliminates ammonia and nitrite
Prevents fish loss
Immediate fish introduction
#TOP 8

Fluval Quick Clear Water Clarifier 120 ml

A8366
Blue
one size
Fluval Quick Clear Water Clarifier 120 ml Cover
Fluval Quick Clear Aquarium Water Clarifier 120 ml

The Fluval Quick Clear is an effective water clarifier designed for freshwater aquariums. It works by trapping floating particles, helping to maintain crystal-clear water, which is essential for the health of your aquatic environment. This product is safe for all aquarium inhabitants, ensuring peace of mind as you enhance your tank's appearance. With a convenient 120 ml size, it's easy to use and ideal for keeping your aquarium looking its best.

What We Like
Effectively traps floating particles
Safe for all aquarium life
Convenient 120 ml size
Easy to use
#TOP 9

Fluval Nitrite Remover Pad for Filters

A264
blue
307 / 407 (6 PACK)
Fluval Nitrite Remover Pad for Filters Cover
Fluval 306/307 and 406/407 Nitrite Remover Pad

The Fluval Nitrite Remover Pad is specifically designed for Fluval 306/307 and 406/407 filters, making it an ideal choice for your aquarium. It effectively removes and reduces nitrite levels, which is crucial for maintaining a healthy aquatic environment. You will appreciate how it traps floating particles, such as debris, excess food, and waste, ensuring clear water. Additionally, this product supports beneficial bacteria, promoting a thriving ecosystem in your tank.

What We Like
Designed for specific Fluval filters
Reduces nitrite levels
Traps floating particles
Supports beneficial bacteria
Convenient 6-pack format
#TOP 10

Fluval Ammonia Remover for Freshwater Aquariums

A1480
White
Fluval Ammonia Remover for Freshwater Aquariums Cover
Fluval Ammonia Remover

The Fluval Ammonia Remover is designed to efficiently eliminate toxic ammonia from your aquarium, ensuring a safer environment for your fish. It is specifically formulated for freshwater use, making it an ideal choice for well-stocked aquariums. By using this product, you can maintain a healthy habitat that supports the wellbeing of your aquatic life. Additionally, it comes in a convenient 3-pack, offering an economical way to purchase necessary inserts for ongoing maintenance.

What We Like
Removes toxic ammonia
Freshwater use only
Supports healthy aquarium environment
Economical 3-pack option
Buying Guide Image
Editor's Notes

During our Fluval aquarium water treatment research, we found 46 Fluval aquarium water treatment products and shortlisted 10 quality products. We collected and analyzed 125,616 customer reviews through our big data system to write the Fluval aquarium water treatments list. We found that most customers choose Fluval aquarium water treatments with an average price of £10.87.

The Fluval aquarium water treatments are available for purchase. The top 10 picks range in price from a low of £3.00 to a high of £11.00, find the one that fits your budget. The seller of top 1 product has received honest feedback from 3,100 consumers with an average rating of 4.8.

Written by
Chloe Foster Avatar

Happy Pet Happy Owner by Chloe Foster sold over 100 thousand copies in the UK. Chloe worked as a veterinarian in The Veterinary Medicines Directorate, Woodham. She stayed for seven years before coming home to set up her pet store in Swansea. Chloe is an experienced veterinarian with a flair for literature. Chloe is vast in the knowledge of animals, animal nutrition, medication, and care.