On Tue, 14 Feb 2006 17:25:48 -0000, Christian McArdle wrote:

2. Metered single cylinder.
More expensive, but a vast improvement.
[snip]
may waste a little salt or go a bit hard if the prediction is out.

I've got mine set with a 10% wastage factor built-in.

Reckon it costs me another bag of salt per year, but I never get hard
water and saved a load of dosh on the purchase of a twin.

Your choice, 2 or 3 - don't buy a 1.

--
Nigel M