>From the "NASA commercial spin-off" list:
"...POOL PURIFICATION - Space technology designed to sterilize water on
long-duration spacecraft applied to swimming pool
purification led to a system that uses two
silver-copper alloy electrodes that generate silver and copper ions when
an electric current
passes through them to kill bacteria and algae
without chemicals..."
http://www.thespaceplace.com/nasa/spinoffs.html
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