On Mon, 8 Nov 2004 01:31:33 UTC, "IMM" wrote:

If you look in Google Groups, use the advanced search and try keywords
like "descalers" and "water softeners" in this group only, you will be
able to form your own conclusions based on experiences of those who
have tried them and one notable individual who claims that they work
for him.

Google will reveal many people who have success with these. Google will also
reveal lots of people who makes thing up.

And it will reveal that these are the same people.

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