Best Water Treatment Products Deals Online in the UK (25 Deals Found)

Last Updated - 09/09/2026 Sort By:

Best Choice
Blagdon

New
Blagdon Green Away Pond Water Treatment, Clears Green Water and Suspended Algae Particles, Natural, Plant Friendly, Safe
CLEARS GREEN POND WATER – Green Away rapidly clears green water by clumping together suspended particles of algae causin

£7.95
HYDRA

New
Hydra Fountain Clear Water Feature Cleaner | 250ml Treats 7,500L Highest Dilution Rates - Water Feature Treatment Keeps
Crystal Clear Water: The Hydra Fountain Clear is a water fountain clarifier that can be used all year in both indoor and

£19.90
New
Clearwater CH0009 Water Clarifier for Hot tub Spa and Swimming Water Treatment
Bestway Clearwater 1 Litre Clarifier is the utmost tool for keeping the water in your pool or spa looking spotless and c

£6.71
Best Value
COLOR WOW

New
Color Wow Dream Filter Hard Water Hair Treatment, Brassy Hair Fix, 200ml
Gently detoxes hair by removing minerals, metals, and buildup from hard water

£14.32 £26.00
New
Classic Framed Plus Use Water Treatment Products To Prevent Clogs & Control Sign
These signs feature vivid sublimation printing that ensures clear and lasting colors, making a powerful visual impact.

£13.31
envii

New
Envii Water Butt Klear - Natural Water Butt Treatment - Clears Green Water, Stops Odours, Keeps Water Healthy & Plant Fr
Clears Green Water in Water Butts - Water Butt Klear contains millions of beneficial bacteria to help clear green and mu

£12.95
Gardening Naturally

New
Natural Water Butt Treatment Cleaner Wildlife Friendly
This natural water butt treatment is the perfect solution for keeping your water butt odour free and clean.

£13.95
New
Central Heating Chemicals Concentrated 500ml Range each treats a full system
C300 Cleaner for is designed to target excess flux residues, greases, and oils in addition to installation debris and sl

£10.35
CLEAR waters

New
CLEAR waters Blanket Weed Treatment for Ponds – 1L Bucket to Treat 10,000 / Maintain 80,000L – Quick Action Pond Weed Tr
Not for use in ornamental ponds when frogs/toads spawning as they will want to lay their eggs in the blanked weed. Not f

£20.95
New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment (1L)
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water.

£12.93
envii

New
Envii Pond Klear - Natural Green Pond Water Treatment, Clears Green and Murky Water for Crystal Clear Healthy Water, Saf
Clears Green & Murky Pond Water - Pond Klear clears green and murky water by targetting microscopic particles and nutrie

£16.95
Blagdon

New
Blagdon Clear Pond Water Treatment, 1 Litre, Clears Dirty Green or Brown Cloudy Water Quickly, Natural, Wildlife Safe, H
CLEARS DIRTY POND WATER - Clear Pond rapidly clears green, cloudy, dirty or milky water by clumping together suspended p

£18.49
New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pri
Bestway Clearwater 1 Litre Clarifier is the utmost tool for keeping the water in your pool or spa looking spotless and c

£8.23
Blagdon

New
Blagdon Green Away Pond Water Treatment, Clears Green Water and Suspended Algae Particles, Natural, Plant Friendly, Safe
CLEARS GREEN POND WATER – Green Away rapidly clears green water by clumping together suspended particles of algae causin

£12.49
New
New Vetark Fluke-Ex 100g Skin Gill Fish Lice Parasite Solve Medication Treatment
VETARK FLUKE-EX 100 grams to treat 25,000 litres (5500 gallons). VETARK FLUKE-EX® 100g. Manufactured and distributed by:

£45.89
50% Off
Clearwater

New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pristine Crystal Clear Water (1L)
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water

£4.99 £9.99
New
Clearwater CH0009 Water Clarifier for Hot tub Spa and Swimming Water Treatment
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water Effectivel

£6.42
New
New Vetark Fluke-Ex 50g Skin Gill Fish Lice Parasite Solve Medication Treatment.
VETARK FLUKE-EX 50 grams to treat 12500 litres (2750 UK gallons). VETARK FLUKE-EX® 50g. Manufactured and distributed by:

£26.99
New
Envii Septic Klear Bacterial Septic Tank Treatment & Cleaner Unblock 12 Tablets
Envii Septic Klear - 12 Tablets. From removing the sludge from your pond to helping your garden grow, our products are n

£20.95
New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pri
Bestway Clearwater 1 Litre Clarifier is the utmost tool for keeping the water in your pool or spa looking spotless and c

£7.86
New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment (1L)
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water.

£12.99
New
Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water.

£6.63
New
V12 Car Products Clear View Water Rain Repellent Glass Windscreen Treatment - 50
Rain and sleet will no longer be able to grip and will be bead up and roll off. Product: V12 Car Products Clear View Wat

£7.03
New
Biocide Mould Cleaner Remover Powerful Super Concentrate E700
Biocide Concentrate. Biocide is a Concentrated Product.

£179.99 £199.99
New
Clearwater CH0009 Water Clarifier for Hot tub Spa and Swimming Treatment Water1L
Fast Acting Water Clarifier: For use with hot tubs, swimming pools and paddling pools for crystal clear water.

£14.99

25 Water Treatment Products deals are available from: Amazon, eBay stores, starting from £4.99.
The biggest discount we found is 50% on Clearwater Water Clarifier for Hot tub Spa and Swimming Water Treatment for Pristine Crystal Clear Water (1L) at Amazon.
The lowest price we found is £4.99 while the highest is £179.99.
Prices for the best Water Treatment Products deals average at £20.97.
Last updated on September 9, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Water Treatment Products.