I have been losing about 3/4 of an inch to an inch a day. I did the bucket test, turned off the pump and plugged the returns and skimmer. It was still leaking, so I determined it has to be somewhere in the body of the pool. Also tested the skimmer and light fixture with dye and didn't find anything.

I finally found a hole about the size of the top of an eraser on a pencil. What I think happened was that I was manually vaccuming the pool, and a few months ago, I "hit" something. I think there might have been a small pebble under the liner and somehow I caught it and tore the liner.

Can something that small cause that much water loss, though? The hole is on the floor of the pool, and I'm not sure exactly how I'm going to be able to patch it.