Does anyone have experience with physical water treatment?

There are many products around, promising to change the structure of
calcium carbonate in a way, that this does not deposit within tubes, water
heaters, ...
You can read a lot of people, telling that these products work well, and
others, telling that they don't work at all.

I think the only thing that does not need any discussions is, that all
these products are build of components worth almost nothing, but cost a
lot.
I think an electromagnetic water treater, which costs between 1-2k$ could
be built for about $10, if you know what it really does.

I've seen pictures of such devices, containing a microcontroller, some
transistors and 2 electromagnets. others only have some glue logic, which
directly drives 2 antenna like wires.

As far as i understand, most of the electromagnetic products have 1 or
more electromagnets, which get either a constant ac frequency, or sweep a
frequency range.

It would be of great help, if someone could publish the frequency and
power, that these treaters usually work with, and eventually, someone has
experience with self built products.

thanx a lot!

tino

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