The black square raft that is
floating at the west end of the pond is an ultra sonic device to
eliminate, or at least reduce, algae in the water - this picture
shows it being installed.
Beneath the floating raft is an electrical powered ultra sonic
transmitter beams ultra sound waves across most of the pond. These
are not harmful to fish or plants but it is claimed they will destroy
the algae.The unit is being loaned free for a trial period and we
have yet to see how effective it will prove. However it is only
tackling one symptom of poor water quality and not its true cause.
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