On Wed, 07 Sep 2005 18:13:52 +0100, Broadback
wrote:

Also we live in a hard water area so is
it worth filling it with rainwater (that will take quite a while even
though I will divert it from the roof house) or will tap water left for
a couple of weeks be as good?

Hard water meaning lots of calcium? Consider yourself fortunate and
the tap water will be great. I only have to leave my tap water
overnight or add a water conditioner to dissipate the chlorine, but I
add limestone (Some use seashells.) to keep up the GH (General
Hardness) or calcium.

Regards,

Hal