"Benign Vanilla" wrote in message
...



I think you are refering to a roof scrubber, as I have read about. As we
are
not using this water for drinking water, I don't think it is worth
worrying
about. I am also not convinced that it would be necessary for pond water
or
garden water.
snip

--
BV.
www.iheartmypond.com




You're going to wash a fresh supply of bacteria and organic matter into a
closed tank every rain. It'll smell loverly after a few days cooking when
it warms up. Also, you won't have a good bottom drain to rinse the
accumulated gunk out.

OTOH, if you're just filling a barrel or two which will be used quickly,
don't worry about it.