10 Best Pond Clear Water Treatment For Green Water in The UK

Last updated on 24/06/2025

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Envii Pond Klear Xtra – Strong Pond Clear Water Treatment, Naturally Clears Green Pond Water – Treats Up To 100,000 litres

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Why We Love It

Powerful multipurpose pond treatment.
Natural beneficial bacteria usage.
Safe for aquatic life.

Main Highlights

Multipurpose Pond Treatment – Pond Klear Xtra is a multipurpose treatment helping clear green & murky water, maintain healthy sludge levels & help reduces the chance of blanket weed.
Natural Beneficial Bacteria Treatment – Containing billions of natural beneficial bacteria, Pond Klear Xtra is 3 x stronger than our original Pond Klear. This makes it one of the strongest treatments on the market.
Safe for all Fish & Wildlife – Like all Envii pond products, Pond Klear Xtra is safe for all fish, wildlife & plants. This can be used in conjunction with all other bacteria treatments.
Easy to use – With a built in measuring chamber, applications are really easy. We recommend using 10ml per 1,000 litres of water. This makes for reliable and quick treatments.
Treats a Large Volume of Water – Pond Klear Xtra treats up to 100,000 litres of pond water. If your pond is under 20,000 litres, this means you will get multiple treatments to last you through the year.

NT Labs Pond Magiclear, Clears Green and Cloudy Water, Control Against Algae Build up, Improves Pond Water Quality, Pond Water Flocculant (1 Litre)

Why We Love It

Clears green, cloudy water.
Easy to use.
Suitable for all ponds.

Main Highlights

【CLEARS GREEN AND CLOUDY POND WATER】: Use when water appears green and/or cloudy. Magiclear causes particles in the water to clump together which can then easily settle out of suspension or be removed by the filter.
【EASY TO USE】: To work out the required dosage for your pond, simply calculate the volume of your pond in litres (length x width x depth (in cm)/1000) or alternatively, use our Online Dosage Calculator. Test the pH and KH of the water (Do not use if the KH is below 6 or the pH is below 7). Aerate pond well e.g. fountain, waterfall or air pump. Conduct a partial water change (as much as is practical) before use, especially if the water is extremely green, like “pea soup”. Switch off pump only if strong flow rate could prevent particles from clumping but remember to switch back on as soon as water clarifies.
【SUITABLE FOR USE WITH A FILTERLESS POND】: Without a filter, some clumps may float and can then be removed using a net. Use when you have plenty of time to observe the fish and take action in the unlikely event of a reaction.
【POND WATER FLOCCULANT】: Magiclear is a flocculant, meaning it causes particles to clump together. Follow with a dose of NT Labs Sludgeclear to clear any excess sludge which may settle at the bottom of your pond
【SUITABLE FOR ALL POND KEEPERS】:The ease of use of Pond Magiclear means it is perfect for use by beginners and seasoned pond keepers alike.

AquaDesign CLEAR POND Water Clarifier 5000ml - Clears Green & Cloudy Water - TREATS 25,000L

Why We Love It

Removes haze and cloudiness.
Safe for fish and plants.
Visible results in under 24 hours.

Main Highlights

AquaDesign POND CLEAR removes haze, cloudiness and green water
Non-toxic formula is safe for fish and plants
Fast acting - visible results in under 24 hours
Easy to dose Liquid
Available in 1000ml, 2500ml and 5000ml sizes
Comes with 3ml pipette for dosing

Blagdon Clear Pond Water Treatment, 1 Litre, Clears Dirty Green or Brown Cloudy Water Quickly, Natural, Wildlife Safe, Harmless to Fish and Filter Bacteria, 1L, Treats 20,000 Litres of Water

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Why We Love It

Clears dirty pond water quickly.
Enhances pond's mechanical filtration.
Naturally safe for all species.

Main Highlights

CLEARS DIRTY POND WATER - Clear Pond rapidly clears green, cloudy, dirty or milky water by clumping together suspended particles causing them to sink to the bottom of the pond or to become trapped in the filter
FAST ACTING - you should expect to see great results within just a few hours
NATURALLY SAFE - Clear Pond is harmless to filters and all species of pond fish, plants and water using wildlife
ENHANCES FILTRATION - Clear Pond enhances mechanical filtration in your pond to help keep your water crystal clear
ACCURATE DOSING CHAMBER - the accurate dosing chamber makes for easy, no mess measurement of treatment to suit the size of pond – shake bottle well for best results

AquaDesign CLEAR POND Water Clarifier 2500ml - Clears Green & Cloudy Water - TREATS 12,500L

Why We Love It

Removes haze and cloudiness.
Safe for fish and plants.
Visible results in under 24 hours.

Main Highlights

AquaDesign POND CLEAR removes haze, cloudiness and green water
Non-toxic formula is safe for fish and plants
Fast acting - visible results in under 24 hours
Easy to dose Liquid
Available in 1000ml, 2500ml and 5000ml sizes
Comes with 3ml pipette for dosing

Swell Control Green Water 2 Pack. Pond Clear Water Treatment and Pond Cleaner

Why We Love It

Easy to use ready sachets.
Promotes beneficial bacteria growth.
Ideal for year-round use.

Main Highlights

Predosed ready-to-use sachets that can be put straight into your filter
1 pack contains 6 doses, each treating 4546l (1000G)
Economic two pack which should be dosed every 1 - 2 weeks
Packed with beneficial bacteria that break down sludge and prevent algae growth
Safe for Koi, community and wildlife ponds, and can be used year-round

Aqua Design CLEAR 2500ml Aquarium Water Clarifier - Leaves Water Crystal Clear - Green & Cloudy Water Treatment - Treats 12,500L

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Why We Love It

Clears green and cloudy water.
Safe for all fish and plants.
Highly concentrated formula offers value.

Main Highlights

Clears green & cloudy water
Safe for all fish and plants (not recommended for aquariums containing shrimps and snails)
Suitable for Aquariums and Ponds
Aqua design CLEAR 2500ml comes with 3ml pipette for easy dosing
Also available in 500ml, 1000ml and 5000ml sizes
Dosage: 2ml per 10L (dosage can be doubled if needed)
Highly concentrated formula offers exceptional value

Envii Pond Klear - Natural Green Pond Water Treatment, Clears Green and Murky Water for Crystal Clear Healthy Water, Safe for all Fish and Wildlife - Treats Up to 20,000 litres (4,400 Gallons)

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Why We Love It

Clears green, murky pond water.
Contains beneficial bacteria.
Improves water clarity.

Main Highlights

Clears Green & Murky Pond Water - Pond Klear clears green and murky water by targetting microscopic particles and nutrients in ponds, clumping them at the bottom of the pond. This will be removed by a pump and filter or digested by the bacteria.
Contains Millions of Benefical Bacteria - Pond Klear contains no harsh chemicals and is completely natural making it safe for all fish including koi & sturgeon, wildlife & plants
Improved Water Clarity - Used weekly, Pond Klear will help improve the clarity of the pond water along with benefiting fishes health by removing phosphates and replenishing good bacteria
Easy to Use Bottle - With an accurate dosing chamber, applications are really easy to ensure you're using enough per treatment to suit the size of your pond
Treats Large Areas - 500ml bottle will treat up to 20,000 litres of water. All instructions are on the back of the bottle

Tetra Pond Crystal Water, Effectively Clears Dirty Pond Water, 500 ml

18% OffFree Shipping

Why We Love It

Binds suspended particles efficiently.
Works within a few hours.
Easy to use and effective.

Main Highlights

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Binds suspended particles
works within a few hours

Blagdon Clean Pond Pods, Clears Blanket Weed, Reduces Filter Cleaning, Feeds Aquatic Plants, Eats Pond Sludge, Removes Chlorine, Makes Tap Water Safe, Pet & Wildlife Safe (pack of 6 pods)

15% OffFree Shipping

Why We Love It

All-in-one pond care solution.
Wildlife and pet safe product.
Effective blanketweed reduction promises.

Main Highlights

ALL IN ONE TREATMENT - the soluble pouches harmlessly dissolve, releasing gentle active ingredients, to clean your pond, clears blanketweed, eats pond sludge, feeds aquatic plants, reduces filter cleaning, makes tap water safe by removing harmful toxins
REDUCES POND & FILTER MAINTENANCE – the pods work within the pond ecosystem, most effective when used over a consistent period of time and are not an overnight solution, once established the unique formula will soon have your pond crystal clear
PET & WILDLIFE SAFE – our Clean Pond Pods are harmless to pets and wildlife, beneficial to filter bacteria and can be used in wildlife ponds and ponds with fish and other pond water inhabitants
BLANKETWEED REDUCTION - should become apparent within a month of starting treatment. For long-term effectiveness, usage should begin when temperatures reach 10°C around April in the UK and continued monthly until temperatures drop below 10°C
USE EFFECTIVELY IN A FILTER - Clean Pond Pods can be used in conjunction with Blagdon Clean Pond Machine Filter for exceptional results. However, Clean Pond Pods are also suitable for direct to pond use and with most other filter systems

8.7

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We scanned 807 products

We reviewed these offers relevant to the Pond Clear Water Treatment For Green Water within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like envii, NT Labs, AquaDesign, Blagdon, Swell UK, Tetra, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Pond Clear Water Treatment For Green Water in the market, we considered we took a deep dive into 4036 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Envii Pond Klear Xtra – Strong Pond Clear Water Treatment, Naturally Clears Green Pond Water – Treats Up To 100,000 litres. We love many things about this product by envii. What sets it apart from the competition is Powerful multipurpose pond treatment, Natural beneficial bacteria usage. , Safe for aquatic life.
The best value product for most shoppers and where user satisfaction is continuously the highest is NT Labs Pond Magiclear, Clears Green and Cloudy Water, Control Against Algae Build up, Improves Pond Water Quality, Pond Water Flocculant (1 Litre) by NT Labs based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Pond Clear Water Treatment For Green Water and the best cost-to-value ratio is Blagdon Clear Pond Water Treatment, 1 Litre, Clears Dirty Green or Brown Cloudy Water Quickly, Natural, Wildlife Safe, Harmless to Fish and Filter Bacteria, 1L, Treats 20,000 Litres of Waterat Blagdon with a 27% discount.
Our list of the best Pond Clear Water Treatment For Green Water is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Pond Clear Water Treatment For Green Water in The UK

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We scanned 807 products

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