In this guide we’ll look at the best pond water treatment products for the UK market.
We’ve compared ease-of-use, effectiveness, size and cost
to give you our top recommendations.

What Is The Best Pond Water Treatment?

  • Features
  • Treats 20,000 litres
  • Easy to use
  • Very effective against green water
  • Cost
Rating
9.8/10
  • Features
  • Makes tap water suitable for fish
  • Easy to use with a dosage chamber
  • Treats 9,000 litres of water
  • Cost
Rating
9.7/10
  • Features
  • 100% effective against blanketweed.
  • Safe for plants and fish
  • Easy to use
  • Cost
Rating
9.3/10
  • Features
  • Reduces ammonia and nitrates
  • Increases beneficial biological activity
  • Easy to use
  • Cost
Rating
8.7/10
  • Features
  • Effectively clear pond
  • Improves water quality
  • Clears ponds up to 10m³
  • Cost
Rating
8.4/10

More Detailed Pond Water Treatment Reviews

Envii Pond Klear – Green Water Treatment

Envii Pond Klear – Green Water Treatment is the best pond water treatment because it is easy to use, a bottle goes a long way and it effectively clears green water.

This pond treatment works by binding together suspended particles to reduce green and cloudy water. These particles then sink to the bottom of the pond and are either passed through the filter or will be broken down by bacteria. This beneficial bacteria treatment works at temperatures as low as 4°C and as high as 40°C.

The treatment works to clear the water and can also be used as a preventative treatment to keep your pond clear. One bottle treats up to 20,000 litres of water. The treatment is easy to use and gets to work straight away.

Overall, this is a simple easy to use and cost-effective way to clear green water and make your pond clear and fresh.

Blagdon Large Fresh Start for Ponds

Blagdon Large Fresh Start for Ponds is the perfect way to condition tap water to make it suitable for fish.

This water treatment effectively conditions tap water to make it suitable for fish. It does this by removing harmful chlorine and heavy metals. It also adds a protective coating of Aloe Vera which further protects fish against the aggressive effects of tap water.

This water treatment is easy to use as it has an integral dosage chamber in the bottle. Each bottle contains 1 litre and 25ml is enough to treat 227 litres of water. The treatment should be used on all new ponds and whenever you top your pond up with tap water.

This tap water treatment is easy to use and gives you the peace of mind that your water will not harm fish.

Nishikoi Clear Waters Pond Blanketweed Treatment

Nishikoi Clear Waters Pond Blanketweed Treatment is 100% effective against blanketweed and is works in just two weeks.

This treatment contains the active ingredient Monolinuron which is a powerful fast-acting algicide. It is safe to use with UV lights and filters. It is also safe for pond plants and fish. This bottle is enough to treat up to 10,000 litres of water. Your pond will require two treatments at intervals to become completely clear of blanketweed.

This is an astonishingly effective solution to the problem of blanketweed in garden ponds.

Evolution Aqua Pure Pond

Evolution Aqua Pure Pond maintains crystal clear and healthy water in your pond making it look and smell nice as well as being healthier for fish.

This product is simple to use as you add it to your filter once a month. It will remove ammonia and nitrates from your pond by increasing biological activity. This 500ml pack is suitable for ponds up to 10,000 litres.

As well as keeping your pond clear this product will reduce the amount of time you have to spend cleaning your pond filter.

This pond treatment is highly effective at lowering nitrate levels in your pond to provide a clear and healthy environment for fish.

Oase AquaActiv PondClear

Oase AquaActiv PondClear treatment is easy to use and effective at creating a clear and healthy environment in your pond.

Organic waste from decaying plant matter and fish waste can build up in your pond making it cloudy and increasing the level of nitrates. This product works by binding together the floating particles that cause cloudy and murky water in your pond. These can then be removed with a net leaving a clear and healthier pond.

This product is fairly straightforward to use, though you do have to use a net to clear the pond after the product has taken effect. It is effective against decaying matter, fish waste and non-filterable pollutants such as heavy metals. This 500ml container is suitable for ponds up to 10m³.

This is an effective product that will improve the water quality and appearance of your pond.

FAQ

How do you apply water treatment to your pond?          

Different pond water treatments work in different ways so be sure to follow the instructions that come with you product.

To use Pond Klear you should follow these instructions.

  • Calculate the volume of your pond so you know how much treatment to use
  • Clean out filters
  • Add 25ml (per 1,136 litres) to a bucket of pond water
  • Stir and distribute evenly in pond

Pond treatments may take up to 6-8 weeks to completely clear badly affected ponds. Some treatments require two doses at intervals so do check the instructions that come with your product. The Evolution Aqua Pure Pond treatment should be added to your pond filter.

Conclusion

Pond water treatments can turn your pond from an unhealthy and smelly green sludge to a crystal clear and healthy environment for your fish. They are simple to use and very effective. If you have a problem with green murky water, I would recommend the Envii Pond Klear – Green Water Treatment because it is easy to use, contains enough to treat 20,000 litres, and quickly and effectively clears green water.