Thanks for info! I'm watching it close and it seems to be leaking at about the same rate, but it hasn't fallen below the returns, lights or stair bottom. I put some food coloring in around all the suspect places but it didn't seem to be drawn in at any of those places.

How could this much water leak out the bottom of the liner with the pool crete there? Wouldn't the water get pooled between the poolcrete and liner?

Also, since I've lowered the water I noticed there are 3 rust spots around the pool where the liner is attached to the coping. The rust seems to have blead through. Could this be rusting screws below the coping? Is there a safe and effective way to remove the rust stains?

As I mentioned, the pool is only a few months old, but I guess I have no warranty since the pb is out of business.