My pond is about six feet wide, twenty feet long and about four feet deep but I know that its slowly losing water because I can see it slipping down the side of a pond statute. My intention is to pump out sufficient water until it is losing no more water measured by the statute and then see if there is something or other that I can use to coat the exposed surface but I have no idea what that is which is why I have posted this. So, any suggestions are welcome.