What would work is a "timer motor". They're inexpensive,
and can be found in, probably, 6 or 12 rpm versions.
I found that air bubblers and high speed motors with wire
or other type impellers caused large amounts of "sparklers" (silver
crystals, I presume).  Attach a flat piece
of plastic to the shaft and it will stir the water gently without causing
any disturbance to the process.  Just do
a search for timer motors on the internet and you will find them.  They're
designed for operating electrical switches.
Good luck!

Al
----- Original Message -----
From: "Rich Adams" <rad...@kc.rr.com>
To: <silver-list@eskimo.com>
Sent: Sunday, December 30, 2001 8:05 PM
Subject: Re: CS>CS & wattage


> Now, I just need to figure out how to make a stirring unit, one idea so
far
> is incorporating a 12v windshield washer pump, taking water from the top
of
> the jug and pushing it out at the bottom along the wall of the curved
> glass.....just an idea so far, my luck all the pumps will be metal.
>
> Respectfully,
> Rich Adams
> rad...@kc.rr.com
>
> >
>
>
>
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