I’m sorry to say that
"I’m sorry to say that it just wasn’t man enough for the job; in this particular case the blanket weed was too overwhelming and we ended up having a major manual clean out to get rid of it"
£15.95
Unit price per300g Treats Upto 10,000 Litres
Blanketweed Klear is a powerful and fast-acting treatment designed to tackle floating blanket weed in your pond. Using oxygen to instantly kill the weed, Blanketweed Klear eliminates it within 24 hours, restoring the clarity and beauty of your pond. For submerged algae, we recommend Algae Klear Xtra.
If you’re unsure about the type of algae affecting your pond, check out our Ultimate Guide to Blanket Weed for more helpful information!
This innovative formula contains specially selected bacteria that work effectively even in temperatures as low as 4°C. Since blanket weed stops growing below 8°C, you can rely on Blanketweed Klear year-round to keep your pond in top condition.
Before using Blanketweed Klear, we recommend testing your water parameters. Ensure your pH is between 7.5 & 8.5 and your KH is above 5 for optimal results. If needed, stabilize your water with Pond Equaliser.
For long-term protection and to prevent future blanket weed growth, incorporate Pond Klear into your pond maintenance routine.
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.
This works on algae that floats on the surface of the water. For submerged algae, use Algae Klear Xtra
Blanketweed Klear won't kill pond plants but can cause temporary discolouration if applied directly.
No, it is safe for fish and will improve their health by increasing the oxygen levels in the water.
Certain sizes of Blanketweed Klear are vacuum-sealed during production and all the air is removed from the packet. As such, upon delivery, the product can feel solid. However, once the packet has been opened and air introduced, the product will loosen up to a powder again.
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: 4.5 / 5 from 98 reviews.
Blanketweed Klear is a fast-acting treatment for floating blanket weed in ponds, eliminating it within 24 hours and maintaining pond clarity year-round. Users report varied feedback on its effectiveness, but many appreciate its ability to clear and clean the pond.
Review topics: [instructions, results, service, works, use, pond, advice, weed, cleared, blanket weed].
"I’m sorry to say that it just wasn’t man enough for the job; in this particular case the blanket weed was too overwhelming and we ended up having a major manual clean out to get rid of it"
"Tried it over a few weeks with several applications. Other than very temporary reduction it kept coming back, so resorting to raking it off as before."
"Blanket weed worked really well; unfortunately, the all-clear for algae complete waste of money. It had no effect"
"As a new small ponder owner I wanted to remove what looked to be blanket weed. I followed the instructions but the weed was not just surface weed. The weed had disintegrated within 24hours but made the water very green from particulate which was too fine for the net. The pond became progressively worse. I asked advice from envii who a recommended pond klear. I also used a balancing product from them. Anyway, following their instructions carefully I now have a lovely clear pond and can enjoy watching the fish but it’s been expensive and laborious."
"Worked a little bit but not very well. Used the entire packet but the blanket weed has come back"
"Very disappointed- did not have any effect and is I feel a waste of money"
"Great service, as usual."
"👍⭐️⭐️⭐️⭐️⭐️"
"Used Blanket Weed clear for the first time on two smallish ponds with pump and waterfallThe results were very good used in conjunction with Algae Clear Xtra and after to weeks the blanket wed clinging to the pond walls and even hoses for the pumps and fountain almost completely clear. Great products. Thank you."
"Worked within 30 mins most difficult part was getting dead blanket weed out! Pond looking hood now after initial plant discolouration which lasted 3-4 days. Great oriduct"
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.