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Envii Sludge Klear

Natural, bacterial sludge remover for ponds that targets the build-up of unwanted organics at the bottom of your pond. This layer of sludge can sometimes give off unpleasant odours, so it is important to treat it with bacteria.

Available as 6 or 12 tablets.

Treats 60,000 litres

Treats 30,000 litres


SKU: SLK Categories: , Tag:

Treats 60,000 litres

Treats 30,000 litres


Nobody wants to do dirty jobs when it comes to cleaning a pond, but unfortunately, they need doing. To maintain not only an attractive pond, but a safe pond for fish, there are some simple, but dirty, maintenance jobs that need doing. Pond sludge is undoubtedly the dirtiest of all the pond jobs but can also be the most dangerous to fish.

The build-up of decaying leaves, twigs, fish food and waste can become anaerobic and emit gases that can kill fish. But with the help of a bacterial pond sludge remover you can keep your hands clean, your fish safe and let nature do the dirty work.

Getting rid of sludge and mud in your pond

Envii Sludge Klear is a pond sludge remover that contains millions of beneficial bacteria. Their job is to target pond sludge, break it up and get it to the water column. From there, your filters can catch it and it can be physically washed away. Envii Sludge Klear will work in ponds that don’t have filters but can take longer to work as we’re relying on bacteria alone. The bacteria in Envii Sludge Klear are capable of working at 4°C to remove sludge and improve the health of your pond.

It may get worse, but will get better

With how the bacteria work in pond sludge removers, it’s normal for your pond to worsen before it gets better. The bacteria get into the sludge to disturb it, which can cause your water to look cloudy and murky. Similar to when you disturb mud in a river bed or sand in the sea.

An effective, natural pond cleaning solution

Envii Sludge Klear is an extremely effective, natural solution to vacuuming pond sludge and will provide many benefits in the future. It’s very quick to remove sludge with a vacuum, but by doing this, you remove any beneficial bacteria in your pond and leave your pond susceptible to future problems. We always say that the best approach is to take your time and do it right.

Having an established bacterial colony in your pond creates an army that fight off problems like sludge and green water. There are also a few other things you can do in your pond to prevent the build-up sludge. From reducing how often you feed fish, to removing debris as soon as possible.

  • For best results, ensure pH is between 7 & 8.3 when using any bacterial treatment.
  • Bacterial treatments are not a quick fix and can take several weeks to completely resolve the problem.
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Envii Sludge Klear can also be used to seed filters. Simply turn off your pump and add one tablet directly to the media. After 1 hour, turn the pump back on.

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Is this safe for fish?
Yes, this is a natural product that is safe for all fish, pets and wildlife.
Will these work in a pond without a filter?
Yes, this will work without a filter but may take slightly longer.
Will this clear green water?
No, Envii Sludge Klear targets the sludge that builds up at the bottom of the pond.

How to use

  • 1

    Check pH of pond water and if required, use Pond Equaliser

  • 2

    Use one tablet per 5,000 litres of pond water and add to a bucket of pond water

  • 3

    Leave to dissolve for two hours and then stir and add to pond

  • 4

    Reapply every 7 days to keep ponds clear

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