In article , Tim Nicholson
writes
Last year we tried Algo-rem from Tetra, and whilst we observed a
small improvement over the summer, the pond *really* cleared up during
the winter, but once the sun and any form of heat came back in spring
this year, we're back to the same green murk once again. I also have
some barley straw bundles which I was also told would help, but as yet
(2 months on) they're not looking very efficient.

Has anyone tried any of the pond vaccuums which you see advertised? I
REALLY want to get this sorted, and am willing to go to the trouble of
draining the pond if neccessary, but would rather not, so am looking
for other alternatives first.

Have you tried planting plants with floating leaves to keep sunshine way
from the pond? Usual recommendation is to have half to two thirds of
the pond covered.

Your descriptions suggests you have a well balanced pond and it would be
a great shame to disturb it.
--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm