if you have fish, you dont. this is normal. if you dont have fish and want nothing
living in the water at all, you can either use chemicals like for a swimming pool or
use an ozonator. Ingrid

"fire fly" wrote:

I have a 1000litre pond with uv filter and 2 fountains (one solar) the pond
is overshadowed by two trees but does get direct sunlight for about 4 hours
a day. The water is relatively clear but the bottom of the pound, the pipes
and even the weed are covered with green sediment. How can I get rid of it?




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