It spins way too fast for making CS.
High velocity particle collisions [DC and AC out gens] enhance aggromeration.
DC gens.... imbedded semi conductive layers in the surface tension of bubbles on the electrode, creating more bubbles on that surface to collect particulates... builds up "GreyBeard" into the direction of the water flow, the structure getting progressively weaker till the current is strong enough to break it apart and wash chunks into the water
Solutions:
Use a very small spinner
Go to pulse width motor control to keep the starting and low speed torque.
Use a gear motor.
Just barely moving the water works best.

For 7 years Fred Sprague [Smart Silver Jr polarity switching "AC" generators] had a problem he just couldn't figure out with excessive amounts of large flakes and chunks forming while using a fast stirrer till we traded setups and he used the 30 RPM gear motor stirrer with his gen.
Even his pulse width controlled stirrer was too fast.
He apologized to me for copying it.

Ode



At 11:13 AM 11/29/2012 -1000, you wrote:
Here's a project for the do-it-yourself
craftsmen. Haven't built it, just
passing on.
Smitty

<http://tinyurl.com/blu6f73>http://tinyurl.com/blu6f73