Gogarty wrote:
In what manner does antifreeze (the potable water kind) damage the
electrodes?

Anti-freeze, bleach, chemical bowl cleaner and just about anything else
except vinegar dissolves the coating on the titanium plates. Once the
coating has been dissolved to any great extent, the electrode plates
will not conduct electricity at the same rate as they did when the
coating was there and thus, they don't work any longer. It doesn't
happen as fast if the unit isn't operated while they're in it, but even
just sitting they gradually eat away the coating, reducing the level of
treatment and life expectancy of the electrode pack.

--
Peggie
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Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://shop.sailboatowners.com/books...ku=90&cat=1304