On Fri, 11 Nov 2011 00:56:13 +0100, Timothy Murphy wrote:

I am unclear as to why you would need a tank, where it would be
put to
avoid being unsightly*, and where the water would go when the tank
became full?

I was thinking of using it to water the small front garden.

Yes a small 250l water butt will do that but when it rains it will
fill in minets and that's from an ordinary domestic roof not a couple
of acres like yours. B-)

1l is 1mm over 1m2.

--
Cheers
Dave.