Nishikoi ClearWaters Blanketweed Treatment

SKU: 3041CW
Nishikoi ClearWaters Blanketweed Treatment
Nishikoi ClearWaters Blanketweed Treatment

Nishikoi ClearWaters Blanketweed Treatment

SKU: 3041CW
Tub size
Regular price £24.99
  • Need advice? Call 0151 336 3616

Blanket Weed, or sometimes known as string or filamentous algae is a common problem in many garden and ornamental ponds. 

It thrives on warmth, sunlight and nutrients within the pond water and can make the pond look unsightly. It also chokes the growth of pond flora and fauna and in severe cases fish, especially Sterlet species, can become tangled within it and drowning them.

Ultra Violet Clarifiers and filters cannot reduce this algae leaving the pond owner to utilise a reliable blanket weed treatment.

The most effective treatment for blanket weed (string algae), slime algae and nuisance duck weed and utilises monolinuron, a fast and proven algaecide which is completely safe for use in all ornamental ponds.

The use of ClearWaters Blanket Weed will provide on-going care for your pond which is achieved with ClearWaters cultivated beneficial bacteria, which helps keep your pond clean and the return of the blanket weed.

ClearWaters Blanket Weed does not contain added metals such as copper or zinc. It dissolves quickly and your pond water does not take on a white or milky appearance which can cause stress to fish and neither does it settle and build up on the pond bottom.

Because ClearWaters Blanket Weed does not contain metals there can be no long term detrimental effect on fish, molluscs, water plants and wildlife. It can safely be administered to ponds containing all species of pond fish and is also harmless to frogs and other animals such as birds or pets that may drink from the water.

ClearWaters Blanket Weed is effective in water temperatures down to 4 degrees centigrade and makes this product a successful treatment to fight filamentous algae in the early spring, throughout summer and until late autumn.


Add 25ml of ClearWaters Blanket Weed per 500 litres of pond water (110 gallons). Mix the solution in a bucket or watering can and distribute evenly over the pond surface concentrating on the pond edge and water courses where blanket weed often grows in abundance, but avoid direct contain with beneficial water plants such as lily leaves.

Repeat the process again in 14 days in order for the solution to work most effectively.

After the second treatment its is suggested that the dead algae is removed from the pond bottom in order to avoid excessive biological oxygen demand and nutrient build-up. This can be done manually with a fine scoop net, with a pond vacuum cleaner and with the regular in spring and summer use of ClearWaters Sludge Remover.

On day 28 of treatment, add 25ml for every 2000 litres (440 gallons) and repeat every 2 weeks thereafter. By doing this, you will achieve a better looking pond than ever before.

ClearWaters Blanket Weed is safe to use with ultra violet clarifiers and biological filtration systems, and there is no need to switch off UVC's during the treatment process.

Do not overdose and store this product out of the reach of children in a temperature between 4 - 32 degrees centigrade.

For use in ornamental ponds only. Do not inhale and prevent contact with eyes and skin. Always wash hands after use.

Treats ponds up to
1000ml 10,000 litres
2500ml 25,000 litres
5000ml 50,000 litres
10000ml 100,000 litres

We will dispatch your order of Nishikoi ClearWaters Blanketweed Treatment within 24 hours on your chosen delivery service. Click here for full delivery details.

If you are not completely satisfied with your order you can return it unused within 30 days. click here to start a return or call 0151 336 3616.

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