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Best Pool Clarifiers & Enzymes of 2026

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Toby Butcher

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Pool clarifiers and enzymes are chemical additives that help to maintain a clean and clear swimming pool. Clarifiers work by causing tiny particles in the water, such as dirt and debris, to clump together and sink to the bottom of the pool where they can be easily removed. Enzymes, on the other hand, break down organic matter such as oils and lotions that can accumulate in the water and cause cloudy or discoloured water. By using these products regularly, pool owners can reduce the need for excessive chlorine use and keep their pool looking and feeling great all season long.

At a Glance: Our Top Picks

Top 9 Pool Clarifiers & Enzymes

#TOP 1

Clearwater CH0009 Water Clarifier for Pools

Clearwater CH0009 Water Clarifier for Pools Cover

Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pristine Crystal Clear Water (1L)

The Clearwater CH0009 Clarifier is a fast-acting solution designed for hot tubs, swimming pools, and paddling pools. It effectively treats cloudy or dull water caused by dead algae, skin cells, dirt, and grime, ensuring you enjoy crystal clear water. By binding tiny particles together, it transforms unhygienic environments, allowing your filter to work more efficiently. Easy to use, you simply pour the recommended dose while the pump is on, making maintenance hassle-free for you.

9.9
FTB Score

What We Like

  • Fast acting for clear water
  • Treats cloudy or dull water
  • Enhances filter efficiency
  • Simple application process
#TOP 2

Jolly Gel Swimming Pool Flocculent (8 Cubes)

Jolly Gel Swimming Pool Flocculent (8 Cubes) Cover

Swimming Pool Flocculent Jolly Gel x 2 Boxes (8 cubes) - FREE DELIVERY UK

The Jolly Gel Flocculent is an essential product for maintaining your swimming pool. It effectively removes phosphates, which can lead to algae growth, ensuring a healthier swimming environment. With its ability to improve water clarity, you can enjoy crystal-clear water that enhances your swimming experience. This product works quickly, typically within a few hours, allowing you to see results without long waits. By using this flocculent, you can save time on pool maintenance and enjoy more time swimming.

9.8
FTB Score

What We Like

  • Removes phosphates effectively
  • Enhances water clarity
  • Quick results in hours
  • Easy to use
#TOP 3

ULTIMA-PLUS XP Spa Water Clarifier 5 Litres

ULTIMA-PLUS XP Spa Water Clarifier 5 Litres Cover

ULTIMA-PLUS XP Spa Water Clarifier - Transforms Hot Tub Water From Cloudy and Dirty to Crystal Clear - Suitable for all Hot Tubs, Spas and Pools (5 Litres)

The ULTIMA-PLUS XP Clarifier is designed to transform your hot tub water from cloudy and dirty to crystal clear. Its unique formula binds small particles of dirt together, making it easier for your filter system to remove them. This means you can enjoy a clean and inviting hot tub without the hassle. With just two capfuls needed per use, it is incredibly simple to add to your water, ensuring that you spend less time on maintenance and more time relaxing. Suitable for all hot tubs, pools, and spas, it’s a convenient solution for clear water.

9.6
FTB Score

What We Like

  • Transforms cloudy water quickly
  • Easy to use formula
  • Requires only two capfuls
  • Works with all hot tubs
  • Helps maintain clean water
#TOP 4

Pro-Kleen Spa Clarifier for Sparkling Water

Pro-Kleen Spa Clarifier for Sparkling Water Cover

5L of Pro-Kleen Spa Clarifier - Achieve Brilliant, Sparkling Water - Improves Filter Performance & Efficiency

The Pro-Kleen Spa Clarifier is designed to enhance your spa experience by effectively binding small particles of dirt together. This helps you achieve sparkling and clear water, making your hot tub more inviting. By improving filter performance and efficiency, it ensures that your spa water remains clean and fresh. Using it is simple; just add two caps weekly to prevent dull and cloudy water, giving you peace of mind and a more enjoyable soak.

9.5
FTB Score

What We Like

  • Enhances water clarity
  • Improves filter efficiency
  • Prevents cloudy water
  • Easy weekly application
#TOP 5

Blue Horizons Granular Floc for Pool Cleaning 2 Kg

Blue Horizons Granular Floc for Pool Cleaning 2 Kg Cover

Blue Horizons Granular Floc - Tub of 2 Kg

The Blue Horizons Granular Floc helps clear your pool water by sinking unwanted debris to the bottom, making the water sparkle and look clean. Once these particles settle on the pool floor, you can easily vacuum them away, saving you time and effort in pool maintenance. This product works best with sand filters, ensuring effective cleaning without damaging your system. To use, simply dissolve the floc granules in warm water before adding it to your pool, making it easy to apply and effective in action.

9.5
FTB Score

What We Like

  • Sinks debris to pool floor
  • Easy vacuum removal
  • Suitable for sand filters only
  • Pre-dissolves for simple use
#TOP 6

ClearSpa Clarifier for Hot Tubs and Spas

ClearSpa Clarifier for Hot Tubs and Spas Cover

ClearSpa Clarifier 5ltr / Spa Sparkle 5L- Suitable for Hot Tub, Spa and Swim Spa Water Treatment…

ClearSpa Spa Sparkle is designed to restore sparkling clarity to your hot tub or spa water. By adding 25ml per 1000 litres, you can easily treat cloudy water as the product helps small particles combine and clear up the water. This clarifier is particularly useful for ensuring your spa or jetted pool remains inviting and pleasant for use. With ClearSpa, maintaining clean and clear water becomes a simple part of your spa care routine.

9.5
FTB Score

What We Like

  • Restores water clarity
  • Easy to use
  • Effective for cloudy water
  • Suitable for hot tubs
  • Combines small particles
#TOP 7

Cleenly Hot Tub Water Clarifier - 5 Litres

Cleenly Hot Tub Water Clarifier - 5 Litres Cover

Cleenly Hot Tub & Spa Water Clarifier - 5 litres - Transforms Cloudy, Dull Looking Water - Improves Filter Performance & Efficiency

The Cleenly Water Clarifier is a high-performance solution that transforms cloudy and dull hot tub water into a sparkling oasis. With its unique properties, it effectively binds small dirt particles together, making it easier for your filter to catch them. By simply adding two caps to your spa water once a week, you can significantly improve the clarity and hygiene of your water. This product not only enhances the appearance of your hot tub but also boosts filtration performance and efficiency, ensuring a more enjoyable experience for you.

9.4
FTB Score

What We Like

  • Transforms cloudy water to clear
  • Improves filter performance
  • Easy weekly application
  • Enhances water hygiene
#TOP 8

Relax Spa 1 Litre Hot Tub Water Clarifier

  • Relax
  • RSPA29S
Relax Spa 1 Litre Hot Tub Water Clarifier Cover

Relax Spa Hot Tub Clarifier, 1 Litre

The Relax Spa Clarifier is designed to bring back the sparkle and clarity of your hot tub water, making it look fresh and inviting. It is easy to use—just pour the solution into your hot tub to clear up any cloudiness, saving you time and effort. The 1-litre bottle offers a convenient amount suitable for regular upkeep, so you can maintain clear water without frequent purchases. Plus, the formula is specially made for hot tub care, giving you confidence that your spa is treated with the right product.

9.2
FTB Score

What We Like

  • Restores water clarity effectively
  • Simple, easy application
  • Generous 1-litre size
  • Specifically for hot tubs
#TOP 9

ULTIMA-PLUS XP Spa Water Clarifier 1 Litre

ULTIMA-PLUS XP Spa Water Clarifier 1 Litre Cover

ULTIMA-PLUS XP Spa Water Clarifier - Transforms Hot Tub Water From Cloudy and Dirty to Crystal Clear - Suitable for all Hot Tubs, Spas and Pools (1 Litre)

The ULTIMA-PLUS XP Clarifier transforms your hot tub water from cloudy and dirty to crystal clear quickly. Its unique formula binds small dirt particles together, allowing your filter system to remove them easily. This means you can enjoy clean water without hassle. Simply add two capfuls to your water, and you will see results in no time. Suitable for all hot tubs, pools, and spas, this product makes maintaining clear water simple and effective.

9.1
FTB Score

What We Like

  • Transforms cloudy water quickly
  • Easy to use formula
  • Suitable for all hot tubs
  • Binds dirt for easy filtration

Frequently Asked Questions (FAQs)

1. What do enzymes do for pool water?

Enzyme treatments can be used in pools to help reduce such scum and prevent unattractive foaming. When paired with surfactants, enzymes can also aid in cleaning contaminants from the bottom of the pool. (The surfactants draw contaminants to the surface, where the enzymes can do their work.)

2. How long do pool clarifiers take to work?

If your pool is just mildly cloudy and you are not in a rush to clean it out, a clarifier may be your best bet. A clarifier requires less work and less water but can take to two to three days to achieve the results you are looking for.

3. Do pool clarifiers work?

In a nutshell, pool clarifiers are “mild” versions of flocculants. They're great for mildly cloudy pool or if you have a silt problem that your filters just can't catch. What they do is they bind to these tiny particles to increase their size, allowing your pool filter to catch them.

4. Does pool clarifier raise pH?

Maintain proper water balance and chlorine levels following treatment. Some clarifiers may increase pool pH levels.

Editor's Notes

During our pool clarifiers & enzyme research, we found 170 pool clarifiers & enzyme products and shortlisted 9 quality products. We collected and analyzed 56,706 customer reviews through our big data system to write the pool clarifiers & enzymes list. We found that most customers choose pool clarifiers & enzymes with an average price of £20.18.

The pool clarifiers & enzymes are available for purchase. We have researched hundreds of brands and picked the top brands of pool clarifiers & enzymes, including Clearwater, JOLLY GEL, ULTIMA-PLUS XP, Pro-Kleen, Blue Horizons.

Written by

Toby Butcher Avatar

Toby Butcher

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.