"K30a" wrote in message
...

I overflow the pond every other week or
so.
The fish enjoy this as the raised water
level allows them to get into the overhanging
grasses and nose out insects. They also get to
trim more watercress from the waterfall.

OK, I give in...water changes sound like a good idea. You convinced me. Now
on to the real debate...

Should I remove water from the bottom of the pond? the top? just overflow?
What is best? Where does the bad stuff hang out?

BV.