Note that this effect is not permanent: I've been told that magnetic units'
effect on water only lasts for around 24hrs, so beware of using these in the
feed to a storage tank.
Elecrolytic units work in a similar way (generating a small current in the
between an anode and cathode), but keep up their magic for longer.
There's been a recent explosion of electronic units come onto the market that
send low frequency "radio"signals into the water (wires wrapped around the
pipe connected to a transmitter). Why these should be any better I don't
know: one company I spoke to admitted they were only manufacturing one
because everyone else was.
Matthew Hill, Leeds Environmental Design Associates
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