The lack of plants in the Pond following the cleanout combined with the lovely weather we have been having, have caused filementous algae to grow. As it photosynthesises, oxygen bubbles get caught within the fine strands and make the algae float to the top. At the surface it looks like a brown frothy scum. Although very unsightly this does not pose any long term threat to the pond or the creatures in it. We are currently looking at environmentally sound ways to control this!
However, following testing that was carried out by the Environment Agency, there is also a small amount of Blue Green Algae in the pond - this is highly toxic - at the moment it is only a very small amount, but as a precaution - it is recommended that people DO NOT allow their children or pets to play in or with the water!
Hope to have better news in the near future!!!!