If you go to the archives for january (perhaps december) you will find quite
a few msgs on the subject.

Unless it has rained I would think about a leak in the plumbing that runs
outside or under the pond. That is if you have any. Nedra's fix will
work for any ground or surface runoff problems.

Howard

"David H Wagner" wrote in message
...
When I came home tonight, I found that my pond liner is bubbling
up-bubbles big enough to lift up my lily pots. Is this water underneath
the liner, or air? What do I do?

Thanks in advance,
David Wagner