"Ed Sirett" wrote in message
news
On Tue, 12 Jul 2005 12:54:49 +0000, s--p--o--n--i--x wrote:

Slightly O/T but does anyone know if rust particles will stick to a
strong magnet?

Yes and there is a device marketed to collect the rust in CH systems using
a magnet as the water circulates.

They say they use the same stuff in Magnetec oil, and suspends the iron
particles in the water. Then you drain.