wrote in message
. com...
having drained my pond with various filters that got plugged up in
unusual and various and creative ways, I finally got the point and my
filter, if it overflows drains right back into my pond.
Murphy's rule is: the further from the pond the greater the number of
opportunities for leaking and overflowing outside the pond.
Ingrid

Thanks, I'll have to build in a few safeguards, but I think it will work
out. I get a hundred gallons of filter space and I don't take up any
pond/garden space. I may reach Koi-dom yet. :-)