Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? Pond with a hole... won't hold water

Had a pond builder look at it and he believes we need to re-core it and bring in good clay to ensure we don't fix a symptom of a larger problem. He believes if we try to fix the visible hole the water will just create a new hole somewhere else. Problem is we are looking at a $8-10k investment...