I have used pond clear
"I have used pond clear extra which killed my blanket weed also two I ltr bottles of pond clear over an 8 week period and still my pond is green. i have also checked the balance of my pond which seems ok."
£13.95
Unit price perEach Tablet Treats 5,000 Litres
Sludge Klear is a natural pond sludge remover that uses millions of beneficial bacteria to break down and target pond sludge. These bacteria work by dislodging the sludge and releasing it into the water column, where your pond filters can catch and remove it. While it is effective in ponds with or without filters, it may take longer to work in ponds without filters since the bacteria are doing all the work.
The bacteria in Sludge Klear are capable of operating at temperatures as low as 4°C, helping to improve the overall health of your pond while removing sludge. It's normal for your pond's water to appear cloudier and murkier before it improves, as the bacteria disturb the sludge, similar to how mud or sand is stirred up in water.
Unlike vacuuming, which removes beneficial bacteria and leaves your pond more vulnerable to future issues, Sludge Klear provides a long-term, natural solution. While using a vacuum may seem faster, it doesn't address the root cause. By taking the time to let Sludge Klear work, you ensure a healthier pond environment with lasting benefits.
If you have any questions or need any advice, call us on 01246 240880, email us info@envii.co.uk, or chat live with one of our team.
Yes, this is a natural product that is safe for all fish, pets and wildlife.
Yes, this will work without a filter but may take slightly longer.
No, Envii Sludge Klear targets the sludge that builds up at the bottom of the pond.
Whilst this can be used all year round, it is most effective when water temperatures are above 4°C.
The UV light does not need to be turned off when using this.


Overall rating: 4.3246074 / 5 from 191 reviews.
Sludge Klear is a natural pond sludge remover that uses beneficial bacteria to break down sludge, improving pond health. Users report excellent results and ease of use, though some feedback on sludge reduction is varied. It's a long-term solution that avoids the drawbacks of vacuuming.
Review topics: [delivery, results, water, works, use, pond, sludge, treatment, 4 stars, order, fish, dose, rating].
"I have used pond clear extra which killed my blanket weed also two I ltr bottles of pond clear over an 8 week period and still my pond is green. i have also checked the balance of my pond which seems ok."
"I have been using Sludge Klear for some time, it is a very good product. I would recommend it."
"Not happy with this product done nothing got my pond ??"
"Seems to be working nit sure yet"
"Doesn’t seem to be working"
"great product to help breakdown the sludge in a pond"
"I have applied 2 tablets and can see no appreciable difference so far. Silt levels are exactly the same. My pond does not have fish and I try to remove leaves and surface debris so little organic waste to digest. Purchased due to claim to work down to 4C."
"If I had known that we had to clean the filters every two days I would not have bought this product. I had to get someone to clean the filters every week. I was really disappointed with the product as it did not work for me"
"Sadly I tried this product with high hopes but it didn't work at all. Still lots of duckweed and a smelly pond."
"The sludge came back after a few days"
Keep your pond crystal clear, healthy, and thriving with our premium pond treatments. Designed for garden pond owners, fish keepers, and wildlife enthusiasts, our range tackles everything from water clarity to nutrient balance, ensuring a safe environment for fish and plants.
Whether you need to remove green water, combat stubborn blanket weed, or improve pond health with effective sludge removal, our solutions are fast-acting, and easy to apply. Trusted by UK gardeners for all-season pond care, these treatments help prevent common problems and keep your pond looking its best year-round.