A pond filter with UV can help with algae control, but it is not the most effective solution for blanketweed. Here’s why:

UV Sterilisers and Algae: UV sterilizers are effective in controlling free-floating algae by exposing it to ultraviolet light, which kills algae spores and prevents further growth. The water and algae must come into direct contact with the UV light for it to be effective.

Blanketweed and UV: Blanketweed, however, doesn’t float freely in the water. It attaches to surfaces like pond walls, plants, and rocks, making it difficult for UV sterilizers to treat it effectively. Since it may not be pulled into the filter system, the UV light cannot fully eradicate it.

How to Treat Blanketweed: To treat blanketweed, you’ll need a specific blanketweed treatment. These treatments bind to the algae and break it down, allowing the filter system to pull the remaining algae through the UV sterilizer, killing any spores released by the blanketweed.

You can find blanketweed treatments on our website here: Blanketweed Treatments.

TIP: When treating blanketweed, it's a good idea to replace your UV bulb to ensure that the remaining algae spores come into contact with the ultraviolet light for maximum effect.

For more tips on managing blanketweed in your pond, you can read our blog article: Blanketweed: Remedies and Control.