But would it not depend upon how Much water is being
topped off?? I think I would add some DeChlor every
other day or so- just to be sure the Chlorine wasn't poisoning
the pond.
FWIW....

Nedra
http://www.geocities.com/Heartland/Pines/4836
http://community.webshots.com/user/nedra118

"John Hines" wrote in message
...
"Randy" wrote:

Does using an automatic water filler (which is constantly topping off the
water level with city chlorinated water) mess with the bio environment of
our water or do we HAVE to use a charcoal filter?

I say no, because:

a) the amount of water topped off is small, per day
b) you specify clorine, and not the nastier cloramine