Winter Pond Treatment

Bacterial pond treatment that breaks down the build-up of unwanted material in your pond over winter to help prevent green water and algae in spring. The bacteria will clear water and break up leaves and sludge to keep ponds healthy.

Use code WINTER15 at checkout for 15% off.

£16.95

Each Tablet Treats 5,000 Litres

Free UK 48hr Delivery 

Order Within for delivery between November 14 and November 16 

Winter Pond Treatment is a unique solution designed to keep your pond clean and healthy during the colder months. Often overlooked in winter, ponds accumulate organic waste that can lead to algae blooms, blanket weed, and green water as the warmer weather returns. This specialized treatment uses beneficial bacteria that work efficiently even in temperatures as low as 4°C, breaking down organic waste and preventing it from causing problems come spring.

Thanks to the high concentration of beneficial bacteria, Winter Pond Treatment is specifically formulated to work longer in colder conditions, ensuring your pond remains clean throughout winter. For best results, it’s recommended for use between November and February, with regular treatments of Pond Klear or Pond Klear Xtra throughout spring, summer, and autumn to maintain a healthy pond year-round.

  1. Clean filters before use
  2. Check the pH of the pond water and use Pond Equaliser if required
  3. Dissolve 1 tablet per 5,000 litres of water in a bucket of pond water and leave for 2 hours
  4. Distribute evenly throughout the pond
  5. For ponds without filters, use 2 tablets per 5,000 litres of water
  6. Re-apply every 14 days
  • The unique bacteria work below 4°C, allowing the product to work throughout winter
  • Prevents green water and algae from blooming in spring
  • Breaks down organic waste during winter
  • Can be used with or without pumps and filters
  • It’s 100% natural and safe for all fish, pets & wildlife
  • Reduces sludge build-up on the bottom of the pond
  • Each tablet treats 5,000 litres of water
  • Bacteria

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.

Winter Pond Treatment - envii

Winter Pond Treatment

£16.95

£16.95

Overall rating: 4.4883723 / 5 from 86 reviews.

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Review topics: ["delivery","quality","water","works","results","service","pond","treatment","tablets"].

Review highlights

Reviews

My small garden pond is

"My small garden pond is under an Apple tree canopy, great for shade, bad for leaves. I have used Envii pproducts for the last Two years and the water is definitely cleaier"

— Jeremy H. (5/5)

Just started using this treatment

"Just started using this treatment and it appears to be effective."

— David B. (5/5)

great product to use in

"great product to use in the winter to help maintain a healthy pond"

— Ross T. (5/5)

Great product, I have been

"Great product, I have been using it for about 13 years and it keeps my wildlife pond clean and fresh. I use tablets every week during winter and then Sludge Klear during the warmer months. When emptied a couple of years ago the pond floor had no sludge, just a thin layer a mud. Thanks for a great product and so easy to use."

— Pauline H. (5/5)

Clearing the pond

"The pond pills have partly cleared the pond after trying many other products. But it is only partly clear. Pity. The other makes did nothing."

— On (3/5)

No noticeable differrnce to pond

"No noticeable differrnce to pond dedpite all other parameters good"

— Derek S. (1/5)

as with the other products

"as with the other products from envii i have purchased they have for me worked as intended, and greatful that they do/have, next is to order pond balance treatment thank you."

— nigel b. (5/5)

great product

"Pond was starting to clear and the treatment has urged it along. Shall continue a few more weeks at least. Like the ethos of the firm and helpfulness. Thanks!"

— Joyce B. (5/5)

Quick service. Good product.

"Quick service. Good product."

— Rex T. (5/5)

Excellent product does everything it’s

"Excellent product does everything it’s supposed to do"

— Colin W. (5/5)

Q&A

My pond holds approximately 50 litres. How much of the tablet will be safe to use?
Hi Gaye, For a 50 litre pond, we recommend using half a tablet per treatment. However, as Winter Pond Treatment is 100% natural, using a full tablet per treatment is also perfectly fine if you prefer. Many thanks, Envii