You may want to look at this thread of a few years ago.
http://groups-beta.google.com/group/...6d953e5adc0521
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RichToyBox
http://www.geocities.com/richtoybox/pondintro.html

"PETER DOYLE" wrote in message
news:E2Bae.1372$Yc.257@trnddc06...
My pond, rubber liner - in ground about six years- has developed a slow
leak somewhere in the top eight inches. Can anyone guide me to info about
finding and fixing this? Is there an FAQ that deals with this or a
previous thread?
Thanx.
Pete