Homebrew PCBs

> More of interest is if the ferric cloride is a danger to wastewater 
> cleaning facilities.
> It's just not ok to make them trouble if you can avoid it.


The first time I actually saw Ferric Chloride used in an industrial 
application was in a wastewater treatment system!  I asked what it 
was used for and they told me that it was used to precipitate out 
other chemicals (if I remember correctly).  I was also supprised that 
the ferric chloride was stored/used in a very large open topped poly 
tank.

Closer to topic....

I too am wanting to try regenerating some of my used ferric chloride 
using the iron nail - Power supply method.

Is there any way to know when to stop the plating process or is this 
simply trial and error at this point????