On Fri, 10 May 2013 18:11:33 +0100, "Bob Hobden"
wrote:



"Sacha" wrote ...

This may be interesting to those who have algae in their ponds and
struggle to contain it. I've only just heard of it and it's nothing to
do with us! Unfortunately, it doesn't look as if it controls duckweed!
http://www.dyofix.co.uk/index.html

I think they use Dyofix Pond Black or something similar in Cow Pond in the
Great Park Windsor, it's a large lily pond (lake) and the black water really
sets off the waterlilies which cover it.


End of 2011 information was posted around the New Forest area that if
residents and visitors came across black coloured ponds they shouldn't
be too concerned. This was in connection with controlling Pygmyweed.
This is a link to an article on the Hampshire Wildlife Trust site
which described it.
http://www.hiwwt.org.uk/news.php/545...ng-ponds-black
No mention of a commercial brand, just that was a food dye.

G.Harman