there are a few of us hanging around to answer questions and steer
people to the moderated rec.ponds.
you can get usenet "on the web" without an ISP providing the
newsgroup.
http://www.greatnowhere.com/
there are several but the one above is free.

however, your friend needs to get a filter in there, or, like mine put
in a veggie filter. http://weloveteaching.com/mypond/2000/details.htm
and he needs to get some really good aeration going. Ingrid

On Wed, 27 Jun 2007 14:41:22 +0100, "Sky-Catcher" bobhope@nohope
wrote:

Hi,

A friend got a bit carried away with a digger and now has a rectangular pond
holding 200,000 litres - and the water is green and full of fish - now he
wants to know how he can filter it & keep on top of the green water
problem - any suggestions - he is in the UK

Cheers,

Sky

ps he likes it and doesn't want to fill half of it in!