Bubbles Under Pond Liner
by Kenneth Haynes
(Madison, AL, USA)
Shallow end pond bubbles
I built a pond (200 ft long and 120 ft wide) in my front yard. Lined big protruding rocks with discarded nylon carpet pieces before laying down the pond liner. After about 4 years, huge bubbles appeared in the shallow end (2 ft deep).
Cut a 1 inch slit on the edge of the liner above water level and used a broom to move the bubble across the pong towards the slit. Air came out as the bubble dissipated. There was no discernible smell.
Do you have any idea what causes these bubbles and what to do about it?
I do not know what would cause the bubbles, something happening in the ground I guess. It sounds to me like you have the perfect solution, that is to work them out of the pond as the need arises.
It looks like you have done a great job with your pond and thanks for sharing the photo. Maybe someone who has had a similar experience will offer advice.