"Bob Hobden" wrote in message
...
"Sadge" wrote


Hi, can anybody suggest a cheaper alternative to the rather expensive
ones on the market please?


Some time ago I was given a "Garden Yoghurt" kit and I use that, both in
our pond filters and in the rain barrels to keep them sweet and to ball up
any detritus. Takes a couple of weeks to make a supply
http://www.recycleworks.co.uk/em-gar...-pr-16177.html

--
Regards
Bob Hobden
W.of London. UK

My waterbutt came with a 500ml bottle of

Organica
RAINFRESH +PLUS
Energy drink for your water butt
"Totally organic and cleans the rainwater".

I'm not sure I'll buy any more when it runs out, as it doesn't say whether
it is organic.
Suspect this is what the OP was after... - we won't be wanting dirty
rainwater now, would we?

Lol