"dkat" wrote in message
news
Meant to say that it should soon just settle to the bottom and stop
foaming
if it is dirt particles... unless you have a really disruptive flow of
water
from you pump...

"Mogweed" wrote in message
...
We seem to have developed soapy water. The waterfall has been
running

Hi,
You got 'doc' dissolved organic compounds and this could be from any or all
the things suggested by other posters.
http://www.fishdoc.co.uk/filtration/koi2organics.htm
HTH -_- how
no NEWS is good