George, I think that is a fairly common concern of newly built ponds. I know when we built our ponds they always seemed to be going down faster than we thought and we were convinced we had leaks but after about a year things seemed to settle out for us. Texas summers will also take out far more water than I ever thought. It hasn't happened this year but in past years we could go down almost a foot a week during the dog days. I would give it some time. As far as a pond builder in that area I would think you should at least talk to Mike Otto from this website. He is top notch. Good Luck.