Swell Control Green Water - 6 Pack - BOGOF

A natural green water treatment

At a glance...
  • Water treatment that contains a mixture of friendly bacteria
  • Easy to dose
  • 6 x 28g sachets treat 27,300 litres
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I found this green pond water control easy to use. All I need for my pond, plus as it's non chemical it doesn't affect wildlife in my garden!

What is the Swell Control Green Water?

Swell Control Green Water contains a mixture of friendly bacteria that can help reduce the levels of nutrients which encourage algae to grow in your pond. In addition to being easy to dose and use with no measuring required, this green water treatment is also completely chemical-free and can treat a 1000 gallon pond for up to 3 months. Available as a buy one get one free deal, the Swell Control Green Water pond control contains 6 x 28g sachets and treats 27,300 litres of pond water.

What are the benefits of using a green water pond treatment?

Control Green Water from Swell UK contains a combination of bacteria that break down bottom sludge and odours and help to reduce murky water. It also contains barley straw which can further prevent algae growth that turns pond water green, thanks to microbes that consume algae boosting nutrients. This green water treatment contains beneficial bacteria in a water-soluble fish safe pouch. Simply drop it into your pond ideally near moving water or into a pond filter chamber. The bacteria will reduce excess fish food, fish waste, toxic nutrients such as ammonia and nitrite plus problem causing nutrients such as nitrate and phosphate.

Dosing guide:

For best results, use a double dose the first time you use the green water treatment. Place the sachet in an area of flowing water, such as in the filter or near a waterfall and ensure that your pond is well filtered and aerated, particularly at night, when oxygen levels drop. Use when the temperatures are above 10°C/50°F and apply every 1-2 weeks, or as needed, to keep your water clean and healthy.

Check out our other pond treatments to help make your pond cleaner with less sludge and blanket weed at a great price.

6 x 28g sachets treat 27,000 l/6,000 gallons
1 sachet treats 4546 l/1000 gallons
Application Every 1-2 weeks or as needed


Beneficial bacteria and barley straw. This product is not a medication, pesticide or herbicide and is not intended as a substitute for one.

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