Homebrew PCBs

On Tue, 06 Sep 2005 15:35:44 +0200, lcdpublishing  
<lcdpublishing@...> wrote:

> Hi Stan,
> Do you remember what color the bubbler stones were and how long it
> took for them to dissolve?
> Chris


I tried a blue round one that came with my pump, and that one didn't  
dissolve during 2 weeks or so.
As it was too small it is unsuitable, but i wanted to see if it would hold  
up.
It had a ceramic/glued together sand appearance, and if there was a shaft  
instead of the connection for the hose i would have thought it is one of  
these grinding bits.


ST