I have a courtyard home with an inground pool in the middle. By courtyard I mean all the rooms are located along the perimeter of the pool and therefore the pool is surrounded by a monolithic concrete slab foundation. There are two inlets in the pool, a bottom drain and a skimmer at the top. When I filled the pool to about the top, after one day the water level will drop to the level of the skimmer lip. At first I suspect a leak in the pool shell but then it should not stop at the skimmer lip. I then fill the water up again to 4 inches above skimmer lip, then "plugged" the skimmer lip and water level did not drop, that tells me the pool shell itself is not leaking. Next I pulled out the plug and then went to the other side of the house where the skimmer pipe emerges from the ground and shut off that valve. The water level drops. So I think there is a leak between the skimmer lip and the valve on the other side of the house. How would I go about determining where this leak is? The house being a courtyard home configuration, the pool filter is on the other side of the house and the skimmer pipe is buried under the concrete slab. Any idea how to find the leak and repair it?

Our inground plaster pool has several new leaks this year. We has several patched last year, and now here we are again. We have been wanting to retile the pool as well. We ordered a how to video on Ultra Guard, and epoxy polimer something coating that it supposed to bind to the surface, resurface and repair leaks. However, we are scared to do this ourselves after reading about pools lifiting out of the ground when drained. Has anyone heard of this product, or tried to resurface themselves? How do you prevent the pool from lifting out of the ground? Brandi