Don't see why they would not work in lake water, with a pre filter/strainer
of some kind to remove junk, and an ultraviolet sterilizer after the unit to
get rid of bacteria. Salt water would probably be too much.
Frank

"jeannette" wrote in message
...
Can any of these systems be used on a boat?

http://www.pure-earth.com/ro.html

Thanks,


Jeannette
aa6jh
Bristol 32, San Carlos, Mexico
http://www.eblw.com/contepartiro/contepartiro.html