In message , Jane Ransom
writes

Why use chemicals?
Make the conditions right in your pond and the water should eventually
clear itself.

I've always believed that approach to work too - by the time the
oxygenators and the surface coverers have grown, the blanket weed/alga
usually gives up. Sadly this year it hasn't worked with one of our two
ponds and I'm not sure of the reason....... other than to say that all
the tadpoles in that pond died so I suspect a fairly catastophic
happening. Fortunately the dragon fly larvae have survived - the first
ones have taken wing over the last couple of days and our sticklebacks
have had babies so we must be doing something right.

Meanwhile I keep pulling out the green slime and hoping things will be
better next year.

Jill
--

http://www.bellsbarn.demon.co.uk
(Gardens, geraniums and photographs)