Green rocks

That is one of the first things one notices with a new pond - it looks
pristine and beautiful at first and all the rocks look so good with all the
different colors - everything is so clean and the rocks look so good without
the algae growing on them - then nature takes over and covers everything at
or below water level (or on the waterfall) with algae growth - what we call
the "natural look" - there is nothing you can do about it unless you use
swimming pool chemicals (algaecides) to kill it and then you have a pool,
not a pond with fish and plants - you will get used to it (I did) and enjoy
the living, breathing pond you have created
Gale :~)
Hi can anyone tell me how to clean and prevent the rocks on and around my
cascade going green.The pond is only 6 months old I have stopped the water
flowing over the cascade during winter but would like to clean it up
before
the spring.I have a few fish in the pond which are doing well as I have
kept
filter on.

Thanks

Colin.