On 23/05/2011 17:40, Lol wrote:
"Bob 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

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?

Almost as good as spray on designer label mud for Chelsea Tractors.

Provided the water butt has a lid and stays dark then there really isn't
a problem. You might want to decant the sludge out of the bottom every
few years but that is about it. And if you don't have a lid then an old
carpet tile with half a brick on top will do the job.

Regards,
Martin Brown