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

Last Updated - 04/05/2026 Sort By:

Best Choice
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

£15.95
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

£9.99
New
New Vetark Fluke-Ex 10g Skin Gill Fish Lice Parasite Solve Medication Treatment.
VETARK FLUKE-EX 10 grams to treat 2500 litres (550 gallons). VETARK FLUKE-EX® 10g. Manufactured and distributed by: Veta

£12.19
Best Value
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

£9.99
New
Seachem Purigen for Freshwater, 100 ml
Model number: 020230. Colour changes as it exhausts; easily regenerated.

£13.77
HYDRA

New
Hydra Fountain Clear Water Feature Cleaner | 60ml Treats 1,800L Highest Dilution Rates - Water Feature Treatment Keeps W
Crystal Clear Water: The Hydra Fountain Clear is a water fountain clarifier that can be used all year in both indoor and

£12.50
HYDRA

New
Hydra Fountain Clear Water Feature Cleaner | 60ml Treats 1,800L Highest Dilution Rates - Water Feature Treatment Keeps W
Crystal Clear Water: The Hydra Fountain Clear is a water fountain clarifier that can be used all year in both indoor and

£12.50
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.

£13.29
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

£12.95
New
MIELLE ORGANICS- RICE WATER-HAIR CARE PRODUCTS-TREATMENT, MASQUE-FAST UK POST!!!

£12.75
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
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

£11.87 £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:

£51.15
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
Effective 125ml Fish Tank Ammonia Treatment - Safe for Fresh & Marine Aquariums
Safe for use in both tropical and coldwater aquariums, giving you peace of mind. Effectively removes harmful ammonia up

£9.99
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

£18.90 £19.90
New
Relax Splasher Water Treatment Kit - Box of 4 QUALITY PRODUCT UK SELLER
With its easy-to-use formula, eco-friendly design, and long-lasting effects, this kit is a must-have for any pool owner

£121.38
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
Viresco Koi - Algae / Blanketweed Treatment - Natural Product - No Chemicals
Viresco koi plus is totally biological and harmless to wildlife. Contains Viresco Aqua and humanic acid. Viresco Koi Plu

£65.25
New
Viresco Aqua - Algae / Blanketweed Treatment - Natural Product - No Chemicals
Viresco™ Aqua was introduced in autumn 1997. It was a bonus that it turned out to suppress algae as well! Viresco™ Aqua

£65.95
New
Relax Paddling Pool Water Treatment Sachets Pack of 5 QUALITY PRODUCT UK SELLER
Acts as an algicide and bacteriacide. Each sachet is carefully formulated to treat up to 1000 litres of water, making it

£54.42
New
Effective 125ml Fish Tank Ammonia Treatment - Safe for Fresh & Marine Aquariums
Can be re-dosed after two hours, if required. Safe for tropical and coldwater aquariums. Removes up to 3 mg/l of ammonia

£7.05
New
Bioactive Tapsafe 500ml - All-in-One Aquarium Water Treatment for Healthy Fish
Transform your aquarium water into a haven for aquatic life. With its unique formula infused with protective aloe vera a

£22.95
New
Garnier Ultimate Blends Instant Lamellar Water Rinse Treatment Hair Drink CHOOSE

£7.99
New
3 X Tetra Products
Exactly as in photos…top caps missing hence price ..I also have over 300 other items on eBay from bankrupt or damaged st

£16.15

25 Water Treatment Products deals are available from: Amazon, eBay stores, starting from £7.05.
The biggest discount we found is 5% on Hydra Fountain Clear Water Feature Cleaner | 250ml Treats 7,500L Highest Dilution Rates - Water Feature Treatment Keeps Water Crystal Clear from Algae, Cleans Water & Biofilm Build-up at Amazon.
The lowest price we found is £7.05 while the highest is £121.38.
Prices for the best Water Treatment Products deals average at £25.29.
Last updated on May 4, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Water Treatment Products.