Blanket weed killer
My pond gets blanket weed each year. One of the causes is excess nitrogen, but since some of this is due to run-off from farmland, I can only control it to a small extent. I have seen electronic devices sold which are a control box, with some wires which wrap around and around the pipe from the pump/filter - obviously some kind of magnetic or pulsed field is created and this wrecks the blanket weed cells without harming other plants or animals in the water - has anyone any idea how to make one?
As you can see from pic2 we get tadpoles, small fish and things - the blanketweed can get so thick that the little fish get trapped in it! I have to pull it out, but often you end up pulling fish etc with it, so I'd like to resolve it. We use barley straw to prevent green algae, but it does not prevent blanketweed.