One of our residential pools has a leak in the plumbing that connects the main drain to the second hole in the skimmer. The pool during winter months drops down about 3-4 feet so I am going to guess that the leak is somewhere in that area underground. Is there any way to repair this without ripping apart the pool deck and digging behind the gunite? Its a 1980s Anthony pool.
I saw this video on youtube too but I'm not confident that it could make 90 degree bends.