I had a 3 acre lake built in South Texas about 3 months ago. I have been filling it up with well water. It was filling up perfectly and then all of the sudden after 2 months and about 5 feet from being completely full, it started leaking very bad. It dropped about 6 feet in less than a week. I have continued to run water in and it is staying about the same depth.

I am supposed to have fish delivered next week. Any ideas? Thanks.